Understanding Esophagitis

Your esophagus is a muscular tube, roughly 25 centimetres (10 inches) long in adults, that connects your throat to your stomach. Every time you swallow food or drink, the esophagus contracts in coordinated waves called peristalsis to push the contents downward - even if you are lying down or standing on your head. It is not just a passive pipe; it is an active transport system. The esophagus sits behind the windpipe (trachea) and the heart, passing through the chest before entering the abdomen through a small opening in the diaphragm called the hiatus. Its inner surface is lined with a protective layer of cells called the mucosa. In a healthy esophagus, this lining is smooth, pale pink, and resistant to the passage of food. But it is not designed to withstand stomach acid - and that vulnerability is at the heart of most esophagitis. At the bottom of the esophagus, where it meets the stomach, sits a ring of muscle called the lower esophageal sphincter (LES). The LES acts like a one-way valve: it opens to let food into the stomach, then closes tightly to prevent stomach acid and contents from flowing back up. When the LES weakens or relaxes at the wrong time, acid escapes upward - a process called gastroesophageal reflux - and the delicate esophageal lining becomes exposed to damage. Understanding this anatomy is the first step to understanding esophagitis, because almost every form of the condition involves damage to the mucosal lining - whether from acid, allergens, medications, or infections.

Esophagitis is not a single disease - it is a group of conditions that all result in inflammation of the esophageal lining, but from very different causes. Knowing which type you have is essential because each one has a different trigger, different diagnostic features, and a different treatment approach. 1. Reflux Esophagitis (the most common) This occurs when stomach acid repeatedly flows back into the esophagus due to a weak or relaxed LES. Over time, the acid erodes the mucosal lining, causing redness, swelling, and sometimes ulcers. Reflux esophagitis is the hallmark of gastroesophageal reflux disease (GERD), which affects an estimated 8 - 33% of the global population depending on the region. Common triggers include obesity, hiatal hernia, pregnancy, smoking, and eating large or fatty meals. 2. Eosinophilic Esophagitis (EoE) EoE is a chronic immune-mediated condition where a type of white blood cell called eosinophils accumulates in the esophageal tissue. Normally, eosinophils are not found in the esophagus at all. In EoE, they build up in large numbers - typically more than 15 per high-power microscope field - causing inflammation, swelling, and scarring. EoE is strongly linked to food allergies and environmental allergies (like pollen). It is most commonly diagnosed in children and young adults, particularly males. The prevalence has increased dramatically over the past two decades. 3. Drug-Induced Esophagitis Certain medications can cause direct chemical injury to the esophageal lining if they dissolve or lodge in the esophagus instead of reaching the stomach. The most common culprits include doxycycline (an antibiotic), alendronate (for osteoporosis), NSAIDs like aspirin and ibuprofen, potassium chloride supplements, and iron tablets. The injury typically occurs when pills are swallowed with too little water or when a person lies down immediately after taking them. 4. Infectious Esophagitis This type is caused by viruses, fungi, or rarely bacteria infecting the esophageal lining. The most common infections are Candida (a yeast - causing white patches), herpes simplex virus (HSV), and cytomegalovirus (CMV). Infectious esophagitis primarily affects people with weakened immune systems - such as those with HIV/AIDS, organ transplant recipients on immunosuppressants, or patients undergoing chemotherapy. It is uncommon in otherwise healthy adults.

Before we look at what goes wrong, it helps to understand what normally goes right. Your body has a layered defence system that keeps the esophagus healthy, and esophagitis develops when one or more of these defences break down. Defence 1: The Lower Esophageal Sphincter (LES) The LES is the primary gatekeeper. When functioning properly, it stays closed between swallows, creating a high-pressure zone that prevents stomach acid from entering the esophagus. The diaphragm reinforces this barrier by squeezing around the LES during breathing. Together, they form a double lock that normally keeps acid where it belongs. Defence 2: Esophageal Clearance Even in healthy people, small amounts of acid occasionally slip past the LES. When this happens, peristaltic contractions quickly sweep the acid back into the stomach. Gravity helps too - which is why reflux is worse when lying down, because gravity can no longer assist clearance. Defence 3: Saliva You produce roughly 1 - 1.5 litres of saliva per day, and it is slightly alkaline (pH 6.2 - 7.4). Each swallow washes a small amount of bicarbonate-rich saliva into the esophagus, neutralising any residual acid. During sleep, saliva production drops dramatically - which partly explains why nighttime reflux can be more damaging. Defence 4: Mucosal Resistance The esophageal mucosa has its own protective features: tight junctions between cells prevent acid from seeping through, and a thin layer of mucus and bicarbonate sits on the surface. These defences are modest compared to the stomach’s thick mucus barrier, which is why the esophagus is much more vulnerable. When we understand these four defences, the four types of esophagitis make more sense. Reflux esophagitis occurs when the LES fails. Drug-induced esophagitis occurs when a chemical sits on the mucosa long enough to overwhelm mucosal resistance. EoE involves an immune attack that bypasses all physical defences. Infectious esophagitis strikes when the immune system that normally patrols the mucosal surface is weakened.

While each type of esophagitis has its own specific triggers, several broad risk factors increase your chances of developing esophageal inflammation. Understanding these helps you assess your own risk and take preventive action. Obesity is one of the strongest risk factors for reflux esophagitis. Excess abdominal fat increases pressure on the stomach, which pushes acid upward through the LES. Studies show that people with a BMI over 30 are roughly 2 - 3 times more likely to develop GERD symptoms than those at a healthy weight. Hiatal hernia is another major contributor. This occurs when the upper part of the stomach pushes through the hiatus (the opening in the diaphragm), weakening the LES and making reflux much more likely. Hiatal hernias are common - up to 60% of people over age 60 may have one. Smoking and alcohol both relax the LES and increase acid production. Smoking also reduces saliva production, and saliva is a natural acid-neutraliser that helps protect the esophagus. Immune suppression - from HIV/AIDS, chemotherapy, organ transplant medications, or long-term steroid use - is the primary risk factor for infectious esophagitis. A healthy immune system keeps organisms like Candida and herpes in check; when immunity drops, these pathogens can invade the esophageal lining. Allergies and atopy (a genetic tendency toward allergic conditions like asthma, eczema, and hay fever) increase the risk of EoE. Up to 70% of EoE patients also have another allergic condition. Once the esophageal lining is damaged - whether by acid, allergens, chemicals, or infection - the body’s inflammatory response kicks in. Blood flow increases to the area, immune cells arrive, and the tissue swells. If the source of injury continues, this acute inflammation becomes chronic. Chronic inflammation can lead to serious complications: ulcers (open sores), strictures (narrowing from scar tissue), and in the case of long-standing acid reflux, Barrett’s esophagus - a precancerous change in the cell type lining the lower esophagus. The good news: most esophagitis is treatable and reversible when caught early. Understanding your risk factors is the first step toward prevention.

Esophagitis produces a recognisable set of symptoms, though they can vary depending on which type you have. Knowing these signs helps you describe your experience clearly to a doctor - and seek help before the condition worsens. Heartburn is the most common symptom of reflux esophagitis. It is a burning sensation that starts behind the breastbone and may rise toward the throat. Heartburn typically worsens after eating, when bending over, or when lying down - all positions that make it easier for acid to escape through the LES. Despite its name, heartburn has nothing to do with the heart. It is entirely an esophageal symptom. Dysphagia (difficulty swallowing) is the hallmark symptom of eosinophilic esophagitis, but it also occurs in advanced reflux esophagitis when strictures or narrowing develop. Patients describe a sensation of food “getting stuck” or “not going down properly.” In EoE, dysphagia is often intermittent at first, becoming more frequent as the esophagus narrows from chronic inflammation and scarring. Odynophagia (pain when swallowing) is especially common in drug-induced and infectious esophagitis. Unlike dysphagia, where the problem is mechanical difficulty, odynophagia is about pain - a sharp or burning sensation triggered each time you swallow food, liquids, or even saliva. It can be severe enough to make eating extremely unpleasant. Regurgitation is the involuntary return of stomach contents into the mouth or throat. It differs from vomiting because there is no retching or abdominal effort - the material simply flows back up. Regurgitation leaves a sour or bitter taste and often accompanies reflux esophagitis. Food impaction occurs when a piece of food becomes physically stuck in the esophagus and cannot pass through. This is a medical emergency if the blockage is complete. Food impaction is the presenting symptom in up to 33 - 55% of first-time EoE diagnoses in adults, making it one of the most dramatic ways the condition reveals itself.

One of the most anxiety-inducing aspects of esophagitis is that its symptoms can mimic serious cardiac conditions. Esophageal chest pain and cardiac chest pain can feel remarkably similar, and even experienced doctors sometimes need tests to tell them apart. Esophageal chest pain is typically a burning or squeezing sensation behind the breastbone. It often worsens after meals, when lying flat, or when swallowing. It may respond to antacids. The pain can radiate to the back, neck, or arms - just like a heart attack. Cardiac chest pain (angina or heart attack) is also felt behind the breastbone but is more commonly triggered by physical exertion, emotional stress, or cold weather. It may be accompanied by shortness of breath, sweating, nausea, or a sense of impending doom. Cardiac pain does not respond to antacids. The critical rule: if you are unsure whether your chest pain is cardiac or esophageal, treat it as cardiac until proven otherwise. Call emergency services. It is far better to visit the emergency department for what turns out to be heartburn than to stay home during a heart attack. Esophagitis symptoms can also overlap with other gastrointestinal conditions. Peptic ulcer disease causes burning upper abdominal pain that may improve or worsen with eating. Gallbladder disease causes right-sided upper abdominal pain, often after fatty meals. Gastroparesis (delayed stomach emptying) causes bloating, nausea, and early fullness. A careful history, physical exam, and targeted tests help your doctor distinguish between these conditions.

Not all esophagitis symptoms are felt in the chest or throat. Acid reflux and esophageal inflammation can trigger problems in areas you might not connect to your digestive system at all. Doctors call these extra-esophageal manifestations, and they are surprisingly common. Chronic Cough A persistent, dry cough - especially at night or after meals - is one of the most frequent hidden symptoms of reflux esophagitis. It happens in two ways: refluxed acid can reach the throat and be micro-aspirated into the airways, directly irritating the lungs; or acid in the lower esophagus can trigger a vagal nerve reflex that causes coughing without acid ever reaching the throat. Up to 40% of chronic cough cases may be related to GERD. Hoarseness and Voice Changes When acid reaches the larynx (voice box), it inflames the vocal cords - a condition called laryngopharyngeal reflux (LPR). Patients notice a raspy or hoarse voice, especially in the morning. Singers and professional speakers are sometimes diagnosed after noticing a decline in voice quality that ear, nose, and throat (ENT) treatments do not fix. Dental Erosion Stomach acid is powerful enough to dissolve tooth enamel. Patients with chronic reflux may develop dental erosion on the inner surfaces of the back teeth, where refluxed acid makes the most contact. Dentists sometimes spot this pattern before the patient or their GP suspects GERD. Sore Throat and Globus Sensation A recurring sore throat that does not respond to antibiotics - because it is not caused by infection - may be driven by acid irritation. Globus sensation, the persistent feeling of a lump in the throat even when nothing is there, is another common complaint linked to reflux reaching the pharynx. Sleep Disruption Nighttime reflux frequently disrupts sleep. Patients may wake with coughing, a bitter taste, or the sensation of choking. Over time, poor sleep quality contributes to fatigue, difficulty concentrating, and reduced quality of life - problems that patients may never associate with their esophagus. Asthma Worsening Reflux can worsen pre-existing asthma by irritating the airways or triggering bronchospasm through vagal reflexes. Some asthma patients find that their symptoms improve significantly once their GERD is treated.

While most esophagitis symptoms respond well to treatment, certain warning signs - called alarm signs or red flags - indicate that something more serious may be happening. These signs should prompt you to see a doctor urgently, not wait for a routine appointment. 1. Progressive dysphagia Difficulty swallowing that gets steadily worse over weeks or months - first with solid foods, then with soft foods, and eventually with liquids - suggests a narrowing of the esophagus. This could be a stricture from chronic inflammation, but it could also indicate a tumour. Any progressive swallowing difficulty needs investigation. 2. Unintentional weight loss Losing weight without trying - especially more than 5% of body weight over 6 - 12 months - is a red flag in anyone with esophageal symptoms. It may mean the person is eating less due to pain or swallowing difficulty, or it could signal a more serious underlying condition. 3. Gastrointestinal bleeding Blood in the vomit (hematemesis) or black, tarry stools (melena) indicate bleeding somewhere in the upper digestive tract. In esophagitis, this can come from deep erosions or ulcers in the esophageal lining. Significant bleeding requires immediate medical attention. 4. Persistent vomiting Vomiting that does not stop, especially if it contains blood or “coffee-ground” material (partially digested blood), is an urgent sign. It may indicate severe esophageal injury or obstruction. 5. Anaemia Unexplained iron-deficiency anaemia - low haemoglobin with fatigue, pallor, and shortness of breath - can result from chronic, low-grade bleeding from esophageal erosions that you may not even notice. Using a symptom diary Keeping a simple daily record of your symptoms can be invaluable for your doctor. Note when symptoms occur (time of day, relation to meals), what you ate or drank, what position you were in, how severe the symptom was (1 - 10 scale), and what helped (antacids, position change, nothing). Even one week of entries gives your doctor far more diagnostic information than a vague description of “it hurts sometimes.” A symptom diary also helps identify patterns you might not notice on your own - for example, that your heartburn always worsens on evenings when you eat late or that certain foods consistently trigger discomfort.

When a patient visits a doctor with symptoms like heartburn, difficulty swallowing, or chest pain, the diagnostic process does not begin with a test - it begins with a detailed conversation. The clinical history is often the most valuable diagnostic tool a doctor has. Doctors ask specific questions to narrow down the likely type of esophagitis before ordering any investigations. Key questions include: How long have the symptoms been present? Is swallowing painful (odynophagia) or just difficult (dysphagia)? Does food get stuck - and if so, is it solids, liquids, or both? Is there heartburn or acid regurgitation? Are there allergies, asthma, or eczema? What medications are being taken, and how are they swallowed? The pattern of answers often points strongly toward a specific diagnosis. For example, a 35-year-old man with a history of asthma and food allergies who reports food getting stuck suggests eosinophilic esophagitis (EoE). A 60-year-old smoker with decades of heartburn suggests reflux esophagitis. A young woman on antibiotics with sudden pain after swallowing a pill suggests drug-induced esophagitis. And a patient with HIV who develops painful swallowing with white patches in the throat suggests infectious esophagitis. In many cases of suspected reflux esophagitis, doctors do not immediately order tests. Instead, they may begin with an empiric trial - prescribing a proton pump inhibitor (PPI) like omeprazole for 4 - 8 weeks and seeing if symptoms improve. If symptoms resolve completely, this both confirms the diagnosis and treats the problem. Testing is reserved for patients who do not respond to the trial, who have alarm signs (difficulty swallowing, weight loss, bleeding), or who have symptoms suggesting a non-reflux cause. This stepwise approach - history first, empiric trial when appropriate, investigations when needed - avoids unnecessary procedures while ensuring that serious conditions are not missed.

When the clinical history and empiric treatment are not enough to confirm a diagnosis, the next step is usually an upper endoscopy, also called an esophagogastroduodenoscopy (EGD). This is the single most important diagnostic test for esophagitis. During an EGD, the patient is sedated and a thin, flexible tube with a camera and light at the tip - the endoscope - is gently passed through the mouth, down the esophagus, into the stomach, and into the first part of the small intestine (duodenum). The entire procedure typically takes 15 - 20 minutes. The camera transmits real-time video to a monitor, allowing the doctor (a gastroenterologist) to inspect the mucosal lining in detail. Each type of esophagitis has characteristic visual findings on endoscopy. Reflux esophagitis shows redness, erosions (shallow breaks in the lining), and sometimes ulcers in the lower esophagus. These findings are graded using the Los Angeles (LA) Classification - from Grade A (small erosions under 5 mm) to Grade D (extensive erosions covering more than 75% of the circumference). Eosinophilic esophagitis often shows a distinctive pattern: concentric rings (sometimes called a "ringed esophagus" or "trachealization"), white patches or exudates, linear furrows (vertical grooves), and narrowing (strictures). Drug-induced esophagitis typically shows a single, well-defined ulcer in the mid-esophagus where the pill lodged. Infectious esophagitis shows patterns that vary by organism: Candida produces raised white plaques, HSV creates small round ulcers, and CMV produces larger, deeper ulcers. Importantly, the endoscopy does not just look - it also allows the doctor to take biopsies (small tissue samples) for microscopic analysis. In many cases, the visual appearance alone is not enough for a definitive diagnosis, and the biopsy results are what confirm which type of esophagitis is present.

While endoscopy lets doctors see the surface of the esophagus, a biopsy lets them see what is happening at the cellular level. During endoscopy, the gastroenterologist uses tiny forceps passed through the endoscope to pinch off small pieces of tissue - usually 2 - 6 samples from different locations. The patient does not feel this because the esophageal lining has no pain-sensing nerves. The tissue is sent to a pathologist who examines it under a microscope. Biopsy is essential for confirming the diagnosis, especially when the visual appearance is ambiguous. Each type of esophagitis has distinct microscopic features: Reflux esophagitis biopsies show reactive changes: the basal cell layer (the deepest part of the lining) is thickened, the finger-like projections called papillae extend upward more than usual, and there may be scattered inflammatory cells. In advanced cases, the normal squamous (flat) cells of the esophagus are replaced by columnar (column-shaped) cells that resemble intestinal lining - this is Barrett esophagus, which requires ongoing surveillance because it carries a small risk of developing into adenocarcinoma. Eosinophilic esophagitis biopsies show a specific pattern: 15 or more eosinophils per high-power microscope field (HPF). Eosinophils are a type of white blood cell that is not normally found in esophageal tissue in significant numbers, so their dense accumulation is a hallmark of EoE. Biopsies should be taken from both the upper (proximal) and lower (distal) esophagus, because EoE often affects the entire length. The pathologist may also see microabscesses - clusters of eosinophils - and fibrosis (scarring) in the deeper tissue layers. Drug-induced esophagitis biopsies typically show necrosis (dead tissue) and acute inflammation at the ulcer site. There may be "pill fragments" visible in some cases. The surrounding tissue usually looks normal, which helps distinguish it from other causes. Infectious esophagitis biopsies reveal the causative organism. Candida appears as branching hyphae (filaments) and budding yeast cells. HSV-infected cells show a characteristic "ground-glass" appearance in the cell nuclei and sometimes multinucleated giant cells. CMV-infected cells contain large, distinctive inclusion bodies that pathologists describe as an "owl’s eye" appearance. Special stains and culture techniques can further confirm the organism if the standard microscopy is unclear. The biopsy results, combined with the endoscopic appearance and clinical history, give the doctor a definitive diagnosis in the vast majority of cases.

While endoscopy and biopsy are the cornerstones of esophagitis diagnosis, several other specialised tests play important supporting roles - particularly when the diagnosis remains uncertain or when doctors need to measure how the esophagus is functioning. Ambulatory pH Monitoring This test measures how much acid reaches the esophagus over a 24 - 48 hour period. A thin catheter with a pH sensor is passed through the nose and positioned just above the LES, or a wireless capsule (the Bravo system) is clipped to the esophageal wall during endoscopy. The patient goes about their normal daily activities - eating, sleeping, working - while the device continuously records acid levels. They also press a button whenever they experience symptoms. This allows doctors to calculate two critical numbers: the total percentage of time the esophagus is exposed to acid (normal is under 4 - 6%), and the correlation between acid exposure and symptoms (called the symptom index). pH monitoring is especially useful when endoscopy looks normal but the patient has persistent reflux symptoms. Up to 50% of patients with GERD-like symptoms have a normal-looking esophagus on endoscopy - a condition called non-erosive reflux disease (NERD). pH monitoring can confirm that acid reflux is still occurring, even without visible damage. Esophageal Manometry This test measures the pressure and coordination of muscle contractions in the esophagus. A thin catheter with pressure sensors along its length is passed through the nose into the esophagus. The patient then swallows sips of water while the sensors record the pressure at each point. Manometry reveals whether peristalsis is working normally, whether the LES pressure is adequate, and whether there are any motility disorders (problems with how the esophagus moves). Manometry is not typically a first-line test for esophagitis itself, but it is important in two situations: before anti-reflux surgery (to make sure the esophagus can still push food down effectively) and when the symptom pattern suggests a motility disorder rather than esophagitis - for example, achalasia, where the LES fails to relax and food cannot pass into the stomach. Allergy Testing for EoE Because eosinophilic esophagitis is strongly linked to food allergies, allergy testing is a key part of the EoE diagnostic and management process. This may include skin prick testing (placing small amounts of allergen extracts on the skin and pricking through them), patch testing (taping allergen-soaked discs to the back for 48 hours), or blood tests measuring specific IgE antibodies to common food allergens. The most commonly implicated foods are milk, wheat, eggs, soy, nuts, and seafood. However, allergy testing for EoE is imperfect. Skin prick tests identify IgE-mediated (immediate) allergies well but miss the delayed, T-cell-mediated reactions that often drive EoE. For this reason, many gastroenterologists now prefer an empiric elimination diet approach - removing the most likely trigger foods (often starting with a "six-food elimination diet") and then reintroducing them one at a time while monitoring with repeat endoscopy and biopsy to see which food triggers the eosinophil response.

Reflux esophagitis is the most common type, and its treatment centres on one key goal: reduce the amount of acid reaching the esophagus so the damaged lining can heal. The most effective medications for achieving this are proton pump inhibitors (PPIs). PPIs work by blocking the proton pump - the final step in acid production by the parietal cells of the stomach. By shutting down this pump, PPIs reduce stomach acid output by approximately 90 - 95%. Common PPIs include omeprazole (Prilosec), esomeprazole (Nexium), lansoprazole (Prevacid), pantoprazole (Protonix), and rabeprazole (Aciphex). They are taken once daily, 30 - 60 minutes before the first meal, because the proton pumps are most active when stimulated by food. For most patients with reflux esophagitis, a standard-dose PPI taken for 8 weeks heals the esophageal lining in 85 - 95% of cases. Healing rates are even higher for milder grades (LA Grade A and B). For severe esophagitis (Grade C and D), doctors may prescribe a double dose or extend treatment to 12 weeks. After the initial healing phase, many patients need ongoing maintenance therapy because reflux esophagitis has a high recurrence rate - up to 80% within 6 months if the PPI is stopped entirely. For mild cases, doctors may try "step-down" therapy: switching to a lower PPI dose or to a less potent medication called an H2 receptor antagonist (H2RA). H2RAs - such as famotidine (Pepcid) and ranitidine - block a different pathway of acid stimulation and reduce acid by about 50 - 70%. They are less effective than PPIs but may be sufficient for maintenance in milder disease. Antacids (like Tums, Maalox, and Gaviscon) neutralise acid that is already in the stomach. They work within minutes and provide fast symptom relief, but their effect is short-lived (1 - 2 hours). Antacids are useful as "rescue" medication for breakthrough symptoms but are not effective for healing esophagitis on their own. Long-term PPI use is generally safe, but it is not without concerns. Studies have suggested associations between prolonged PPI use (more than one year) and slightly increased risks of bone fractures, kidney disease, Clostridium difficile infection, and magnesium deficiency. However, for patients with moderate-to-severe reflux esophagitis, the benefits of acid suppression - preventing ulcers, strictures, and Barrett progression - typically outweigh these risks. The key principle is to use the lowest effective dose for the shortest necessary duration.

While medications are the backbone of reflux treatment, lifestyle modifications play an important supporting role - and for patients with eosinophilic esophagitis, dietary changes are often the primary treatment itself. Lifestyle modifications for reflux esophagitis target the mechanical and behavioural factors that worsen acid reflux. The most evidence-backed changes include: Elevating the head of the bed by 15 - 20 centimetres (using a wedge pillow or bed risers - not extra pillows, which only bend the neck). This uses gravity to keep acid in the stomach during sleep and has been shown to reduce nighttime acid exposure by up to 60%. Avoiding meals 2 - 3 hours before lying down. Eating triggers acid production. If you lie down while the stomach is full of food and acid, reflux is far more likely. Weight loss for overweight patients. Even a modest weight reduction of 5 - 10% of body weight can significantly reduce reflux symptoms. Excess abdominal fat increases pressure on the stomach and weakens the LES. Avoiding known trigger foods varies from person to person, but common culprits include fatty or fried foods, chocolate, caffeine, alcohol, citrus, tomato-based foods, spicy foods, and carbonated drinks. Rather than eliminating all of these, doctors often recommend keeping a food diary to identify personal triggers. Quitting smoking is strongly recommended. Smoking weakens the LES, reduces saliva production (which normally helps neutralise acid), and slows esophageal clearance. Dietary therapy for eosinophilic esophagitis (EoE) takes a completely different approach. Since EoE is driven by food allergens, the goal is to identify and remove the trigger foods. The three main dietary strategies are: 1. Empiric elimination diet: The "six-food elimination diet" (6FED) removes the six most common triggers - milk, wheat, eggs, soy, nuts, and seafood - for 6 - 8 weeks. An endoscopy with biopsy is then performed. If eosinophils have dropped below 15 per HPF, foods are reintroduced one at a time (every 6 - 8 weeks), with endoscopy after each reintroduction to identify the specific trigger. Simpler versions - the "two-food elimination diet" (2FED, removing only milk and wheat) and "four-food elimination diet" (4FED) - have been developed to reduce the number of endoscopies needed. 2. Targeted elimination: Based on allergy testing results, though less reliable for EoE (as discussed in Module 3). 3. Elemental diet: A liquid formula containing only amino acids, sugars, and fats - no intact proteins that could trigger an immune response. This is the most effective approach (over 90% response rate) but is very restrictive and difficult to maintain long-term. It is mainly used in severe or refractory cases, particularly in children. For most EoE patients, milk and wheat are the most common triggers - studies show that the 2FED identifies the culprit in roughly 40% of patients, reducing the need for more restrictive diets and multiple endoscopies.

While reflux esophagitis treatment focuses on acid suppression, the other three types of esophagitis each require distinctly different approaches targeting their specific causes. Eosinophilic Esophagitis (EoE) - Beyond Diet When dietary therapy is insufficient or impractical, medication becomes the primary treatment. The first-line pharmacological option is topical corticosteroids - specifically fluticasone (swallowed from an inhaler instead of inhaled into the lungs) or budesonide (mixed into a thick slurry and swallowed). These steroids suppress the immune response locally in the esophageal tissue, reducing eosinophil infiltration. Studies show that topical steroids achieve histological remission (fewer than 15 eosinophils per HPF) in 50 - 70% of patients. For patients who do not respond to steroids or diet, a newer class of medications called biologics has emerged. Dupilumab (Dupixent) was approved for EoE in 2022 - the first biologic specifically approved for this condition. Dupilumab blocks interleukin-4 and interleukin-13, two immune signalling molecules that drive the eosinophilic inflammation. Clinical trials showed it reduced eosinophil counts and improved swallowing symptoms in approximately 60% of patients who had failed other treatments. It is given as a subcutaneous injection every two weeks. PPIs also play a role in EoE management, but for a different reason than in reflux: up to 50% of EoE patients respond to PPIs, suggesting these patients have a condition called PPI-responsive esophageal eosinophilia (PPI-REE). Current guidelines recommend a PPI trial as an early step in EoE management. Drug-Induced Esophagitis Treatment is relatively straightforward: stop the offending medication if possible, or switch to a less irritating alternative. If the medication must be continued (such as alendronate for severe osteoporosis), strict adherence to safe pill-swallowing practices is essential: take the medication with a full glass of water (at least 240 ml), remain upright for at least 30 minutes afterwards, and never take it before bed. The esophageal injury from drug-induced esophagitis typically heals within 1 - 3 weeks once the offending agent is removed. Acid suppression with a PPI may be prescribed to accelerate healing. For pain management, a liquid antacid or sucralfate (a medication that forms a protective coating over the ulcer) can provide relief. Infectious Esophagitis Treatment depends on the specific organism: Candida esophagitis is treated with systemic antifungal medication - typically fluconazole (200 mg on day one, then 100 - 200 mg daily for 14 - 21 days). Oral fluconazole is preferred over topical antifungals because Candida esophagitis involves deeper tissue invasion. For fluconazole-resistant Candida (more common in patients with prolonged antifungal exposure), alternatives include voriconazole or an echinocandin (such as caspofungin). HSV esophagitis is treated with acyclovir or valacyclovir for 14 - 21 days. In immunocompromised patients, intravenous acyclovir may be needed initially, followed by oral therapy once symptoms improve. CMV esophagitis is treated with ganciclovir (intravenous, for 3 - 6 weeks) or valganciclovir (oral). In all cases of infectious esophagitis, addressing the underlying immune suppression - such as starting antiretroviral therapy for HIV or adjusting immunosuppressive medications after transplant - is equally important for long-term control.

For most patients with esophagitis, medications and lifestyle changes are sufficient. But when complications develop - such as strictures (narrowing) - or when reflux does not respond adequately to maximum medical therapy, procedural and surgical options become important. Esophageal Dilation Strictures - narrowing of the esophagus from scar tissue - can develop in any type of esophagitis but are most common in chronic reflux and EoE. When the esophagus narrows significantly, food gets stuck and swallowing becomes difficult or impossible. Dilation is the standard treatment: during endoscopy, the gastroenterologist either passes a series of progressively wider tubes through the stricture (bougie dilation) or inflates a small balloon at the narrowed point (balloon dilation). Both methods stretch the scar tissue and widen the opening. Dilation provides immediate relief but does not treat the underlying cause. If the inflammation continues, the stricture will recur. That is why dilation is always combined with treatment of the underlying esophagitis - PPIs for reflux, steroids or biologics for EoE, and so on. Some patients need repeated dilations over months or years. Anti-Reflux Surgery (Fundoplication) For patients with reflux esophagitis who cannot tolerate long-term PPIs, do not respond to maximum-dose therapy, or prefer a non-medication solution, fundoplication is the established surgical option. In a Nissen fundoplication (the most common type), the surgeon wraps the top of the stomach (the fundus) around the lower esophagus, reinforcing the LES and creating a physical barrier against reflux. This is usually performed laparoscopically (keyhole surgery) with 3 - 5 small incisions. Fundoplication is highly effective: studies show that 85 - 90% of patients have significant symptom improvement, and many can stop PPIs entirely. However, it is not without trade-offs. Common side effects include difficulty swallowing temporarily (due to the tightened valve), gas bloat syndrome (inability to burp or vomit, causing bloating), and increased flatulence. Around 10 - 15% of patients eventually need to resume some acid-suppressing medication. LINX Magnetic Sphincter Augmentation A newer alternative to fundoplication, the LINX device is a small ring of magnetic titanium beads placed around the LES during minimally invasive surgery. The magnets are strong enough to keep the LES closed against reflux but weak enough to allow food and swallowing to open the valve normally. Advantages over fundoplication include easier reversibility, lower rates of gas bloat, and preserved ability to burp and vomit. Studies show similar reflux control to fundoplication in carefully selected patients. Endoscopic Anti-Reflux Procedures Several endoscopic (non-surgical) techniques have been developed as less invasive alternatives. Transoral incisionless fundoplication (TIF) uses an endoscopic device to create a partial wrap around the LES from inside the stomach - no external incisions. While less effective than surgical fundoplication for severe reflux, TIF can be appropriate for patients with mild-to-moderate GERD who want to reduce or eliminate PPI use. The choice between medication, endoscopic procedures, and surgery depends on the severity of the disease, the patient’s preferences, their overall health, and whether complications like strictures or Barrett esophagus are present. Most patients do well with medication alone, but having surgical options available provides an important safety net for refractory cases.

Esophagitis has a frustrating tendency to come back. As we learned in Module 4, up to 80% of reflux esophagitis patients relapse within six months of stopping treatment. The good news is that consistent daily habits can dramatically reduce this risk - often making the difference between needing lifelong medication and managing the condition with minimal intervention. Eating habits have the most immediate impact. Eat smaller, more frequent meals rather than large ones - a full stomach increases pressure on the LES and makes reflux more likely. Finish your last meal at least 2 - 3 hours before lying down. Chew food thoroughly and eat slowly; rushed eating leads to more air swallowing (causing bloating) and larger food boluses that are harder on the esophagus. If you have identified personal trigger foods (through a food diary or elimination diet), continue avoiding them consistently. Sleep positioning remains one of the most effective non-medication strategies. Keep the head of your bed elevated by 15 - 20 cm using a wedge pillow or bed risers. Sleep on your left side when possible - research shows this position keeps the gastroesophageal junction above the level of stomach acid, reducing reflux episodes by up to 70% compared to right-side sleeping. Medication safety is critical for preventing drug-induced esophagitis. Always take pills with a full glass of water (at least 240 ml). Remain upright for at least 30 minutes after swallowing any medication. Never take pills immediately before bed. If you take medications known to irritate the esophagus (NSAIDs, doxycycline, alendronate, potassium supplements), ask your doctor about liquid formulations or enteric-coated alternatives. Weight management provides compounding benefits. Even a 5 - 10% reduction in body weight can significantly reduce reflux frequency. The mechanism is direct: less abdominal fat means less pressure on the stomach, which means less force pushing acid through the LES. Stress management is often overlooked but plays a real role. While stress does not directly cause esophagitis, it can increase acid perception (making normal acid levels feel more painful), promote behaviours that worsen reflux (overeating, alcohol, smoking), and impair the immune defences that protect the esophageal lining. Regular exercise, adequate sleep, and mindfulness practices all support digestive health. The key to prevention is consistency. No single habit is a magic bullet, but the combination of multiple small changes creates a protective effect that is greater than the sum of its parts.

For most patients, esophagitis is treatable and reversible. But chronic, untreated inflammation can lead to serious complications that require ongoing monitoring. The most important of these is Barrett esophagus. Barrett esophagus develops when years of chronic acid reflux cause the normal squamous (flat) cells lining the lower esophagus to be replaced by columnar (column-shaped) cells that resemble the intestinal lining. This process - called intestinal metaplasia - is the body’s attempt to protect itself by replacing acid-sensitive cells with acid-resistant ones. While this sounds helpful, the new cells carry a small but real risk of progressing to esophageal adenocarcinoma - a type of cancer. The risk is often overstated in popular media. The annual progression rate from Barrett esophagus to cancer is approximately 0.5% per year - meaning that in any given year, 99.5% of Barrett patients do NOT develop cancer. However, over 10 - 20 years, the cumulative risk becomes significant enough to justify regular monitoring. Surveillance endoscopy is the standard approach. Current guidelines recommend: Non-dysplastic Barrett (no precancerous changes): Endoscopy with biopsies every 3 - 5 years. Multiple biopsies are taken using the "Seattle protocol" - four-quadrant biopsies every 2 cm along the Barrett segment - to detect any early changes. Low-grade dysplasia (mild precancerous changes): Endoscopy every 6 - 12 months. Endoscopic treatment (radiofrequency ablation or endoscopic mucosal resection) may be offered to destroy the abnormal tissue. High-grade dysplasia (advanced precancerous changes): Endoscopic treatment is strongly recommended because the risk of progression to cancer is 6 - 19% per year. For eosinophilic esophagitis, long-term monitoring involves periodic endoscopy with biopsy (typically annually) to ensure eosinophil counts remain controlled. If the patient is on an elimination diet, any food reintroductions require follow-up endoscopy 6 - 8 weeks later to check for recurrence. Patients on topical steroids need monitoring for local side effects such as esophageal candidiasis (yeast overgrowth from steroid use). For strictures (regardless of the original cause), follow-up endoscopy is needed to check for re-narrowing after dilation. Some patients require repeated dilations over months or years until the scar tissue stabilises.

Beyond avoiding trigger foods, what you do eat can actively support esophageal healing and long-term health. Nutrition plays a larger role in esophagitis management than many patients realise. Foods that support healing During active esophagitis, the esophageal lining is inflamed and potentially ulcerated. Soft, non-irritating foods allow healing to proceed without additional mechanical or chemical stress. Good choices include oatmeal, bananas, melons, lean proteins (chicken, fish, tofu), rice, cooked vegetables, and non-citrus fruits. These foods are unlikely to trigger reflux and are gentle on inflamed tissue. Fibre and digestive health A diet rich in fibre (25 - 30 grams per day) supports healthy digestion and may reduce reflux. Fibre promotes regular bowel movements, reduces constipation (which can increase abdominal pressure and worsen reflux), and supports a healthy gut microbiome. Whole grains, vegetables, legumes, and fruits are excellent fibre sources. One important study found that people who ate more fibre had a 20% lower risk of developing reflux symptoms. Hydration Drinking adequate water throughout the day helps in several ways: it dilutes stomach acid, assists esophageal clearance (washing acid back into the stomach), and ensures medications reach the stomach rather than dissolving in the esophagus. Aim for 6 - 8 glasses daily. Avoid drinking large amounts with meals (which can overfill the stomach); instead, sip water between meals. Probiotics and fermented foods Emerging research suggests that a healthy gut microbiome may influence esophageal inflammation. While the evidence is still early, probiotics and naturally fermented foods (yoghurt, kefir, sauerkraut, kimchi) may support digestive health as part of an overall balanced diet. Patients on long-term PPIs may particularly benefit, as acid suppression can alter the gut microbiome. Nutritional considerations for EoE patients Patients on elimination diets face a particular challenge: maintaining adequate nutrition while avoiding trigger foods. Removing dairy (the most common EoE trigger) means finding alternative calcium and vitamin D sources - fortified plant milks, leafy greens, canned fish with bones, and supplements if needed. A registered dietitian can help design a balanced eating plan that avoids triggers while meeting all nutritional needs. What to limit or avoid Beyond personal trigger foods, some dietary patterns are consistently associated with worse reflux outcomes. High-fat meals (which slow gastric emptying and relax the LES), very large portions, eating quickly, and consuming alcohol or caffeine close to bedtime all increase reflux risk. Carbonated drinks increase gastric pressure and can trigger belching, which opens the LES. Highly acidic foods (citrus, tomatoes, vinegar) can directly irritate an already-inflamed esophagus. The goal is not a restrictive "esophagitis diet" but rather a sustainable, balanced eating pattern that minimises reflux triggers while providing the nutrition your body needs for healing and maintenance.

Over the course of five modules, you have built a comprehensive understanding of esophagitis - from anatomy and types through diagnosis, treatment, and prevention. This final section helps you integrate everything into a practical, personalised action plan. Step 1: Know Your Type The foundation of effective management is knowing which type of esophagitis you have (or are at risk for). Reflux, eosinophilic, drug-induced, and infectious esophagitis each have different triggers, treatments, and monitoring needs. If you have not received a clear diagnosis, discuss this with your doctor - a definitive diagnosis guides every subsequent decision. Step 2: Follow Your Treatment Plan Whether your treatment involves PPIs, topical steroids, an elimination diet, antifungals, or a combination, consistency is essential. Take medications as prescribed (PPIs 30 - 60 minutes before meals, steroids on an empty stomach). Do not stop medications without discussing with your doctor - this is the most common cause of relapse. If cost or side effects are concerns, raise them with your healthcare team rather than adjusting doses independently. Step 3: Build Prevention into Daily Life The lifestyle habits from this module are your frontline defence against recurrence. Prioritise the changes with the strongest evidence: bed elevation, left-side sleeping, meal timing (no food 2 - 3 hours before bed), weight management, and avoiding personal trigger foods. Use the "one change per week" approach to build habits gradually rather than attempting everything at once. Step 4: Monitor and Respond Keep a simple symptom diary - note any heartburn, swallowing difficulty, or pain, along with what you ate and when. This helps identify patterns and gives your doctor valuable information. Know the alarm signs that require urgent attention: progressive difficulty swallowing, unintentional weight loss, vomiting blood or dark stool, and food getting completely stuck. For Barrett esophagus patients, keep surveillance endoscopy appointments on schedule. Step 5: Work with Your Healthcare Team Esophagitis management is a partnership. Prepare for appointments by bringing your symptom diary, a list of all medications (including over-the-counter supplements), and specific questions. If your current treatment is not working, say so - there are almost always alternative options. If you have EoE, consider connecting with support organisations and allergen-aware communities. When to Seek Urgent Care Go to an emergency department if you experience: complete inability to swallow (not even saliva), vomiting blood or material that looks like coffee grounds, severe chest pain that could indicate a heart problem, or signs of a food impaction that does not resolve within a few hours. Remember: esophagitis is a manageable condition. With the right diagnosis, appropriate treatment, consistent prevention habits, and regular monitoring, the vast majority of patients can control their symptoms, prevent complications, and maintain an excellent quality of life.