Eosinophilic esophagitis (EoE) causes difficulty swallowing, food getting stuck in the throat, chest pain, and regurgitation. It affects roughly 1 in 700 people in the United States, and its prevalence continues to rise. EoE is a chronic immune condition where a type of white blood cell accumulates in the lining of the esophagus, causing inflammation that narrows the passage and makes eating painful or difficult.
How EoE Symptoms Feel in Adults
The hallmark symptom in adults is trouble swallowing solid foods. You might notice that meat, bread, or rice seems to “catch” partway down your chest and takes extra effort to go down. Over time, many people unconsciously adapt: cutting food into tiny pieces, chewing excessively, drinking water with every bite, or avoiding certain textures altogether. These coping behaviors can mask the problem for years before it’s recognized.
Food impaction is the more dramatic version of this. A piece of food lodges in the esophagus and won’t move in either direction. If you can’t swallow your own saliva and find yourself spitting it into a cup, that’s a sign the blockage is complete and you need emergency care. Some impactions resolve on their own or with carbonated beverages, but a complete obstruction requires a trip to the emergency department.
Chest pain is another common symptom, typically felt in the center of the chest. It doesn’t respond to antacids, which is one early clue that something other than acid reflux may be going on. Some adults also experience regurgitation of undigested food, particularly after meals.
Symptoms in Children and Infants
Children with EoE often present very differently from adults. Younger kids and toddlers can’t easily describe swallowing difficulty, so their symptoms tend to show up as behavior: refusing to eat, gagging on foods with certain textures, or becoming upset at mealtimes. Vomiting is more common in children than in adults.
Older children may report chest or stomach pain and begin avoiding foods they’ve learned are difficult to swallow. Poor weight gain and slow growth are red flags, particularly in toddlers and school-age kids who seem to be falling behind on growth charts. Increased sensitivity to food textures is also characteristic, with children gravitating toward soft or liquid foods and rejecting anything chewy or dry.
How EoE Differs From Acid Reflux
EoE and gastroesophageal reflux disease (GERD) share enough overlap that one is frequently mistaken for the other. Both can cause chest discomfort and regurgitation. The key difference is the primary symptom: GERD typically centers on heartburn and acid taste, while EoE centers on difficulty swallowing and food getting stuck.
Standard doses of acid-reducing medications usually control GERD symptoms. In EoE, those same medications at standard doses often fall short. Higher doses can reduce esophageal inflammation in roughly 40% to 50% of EoE patients, but through a different mechanism: they decrease production of a chemical signal that recruits inflammatory cells to the esophagus, rather than simply lowering stomach acid. This is why someone on a reflux medication might have their EoE partially treated without anyone realizing the true diagnosis. If an endoscopy is performed while a patient is already on acid-reducing medication, the biopsy can look normal, and the condition gets misdiagnosed as standard reflux.
The endoscopic appearance also differs. GERD tends to cause visible erosions or changes in the lower esophagus. EoE produces rings (sometimes called a “trachealized” appearance), white patches, and vertical furrows along the esophageal lining. These patterns aren’t identical, but in practice, distinguishing between the two conditions requires a biopsy.
What Causes the Inflammation
EoE is driven by an allergic-type immune response. When certain foods or environmental factors contact the esophageal lining, the tissue produces chemical signals that activate a branch of the immune system associated with allergies. This cascade recruits eosinophils (a type of white blood cell) and mast cells into the esophageal wall, where they release substances that damage the tissue barrier and trigger inflammation.
The most common food triggers fall into six categories: milk, wheat, eggs, soy, nuts, and fish or seafood. Cow’s milk is the single most frequent trigger. Removing it from the diet alone produces significant rates of both symptom improvement and tissue healing in many patients. Research suggests that a specific milk protein, beta-casein, may be the primary culprit, though this varies between individuals.
What Happens Without Treatment
EoE is a chronic condition, meaning inflammation tends to persist or return without ongoing management. Over time, repeated inflammation causes the esophageal wall to thicken and stiffen, a process called remodeling. This can lead to narrowing (strictures) that make swallowing progressively harder and increases the risk of food impaction episodes.
One important detail from current guidelines: symptoms alone don’t reliably reflect what’s happening inside the esophagus. Someone can feel better while the tissue is still inflamed, or their swallowing can worsen even when biopsies look improved. This is why monitoring through repeat endoscopy and biopsy matters, not just tracking how meals feel day to day.
How EoE Is Diagnosed
Diagnosis requires two things: symptoms of esophageal dysfunction and at least 15 eosinophils per high-power field on esophageal biopsy. During an upper endoscopy, the gastroenterologist takes at least six small tissue samples from two different levels of the esophagus. A pathologist then counts the eosinophils under a microscope. Other potential causes of esophageal eosinophilia, such as infections or other inflammatory conditions, need to be ruled out.
Updated guidelines from the American College of Gastroenterology have made one notable change: a trial of acid-reducing medication is no longer required before making the diagnosis. Previously, patients had to fail a course of these medications first. Now, EoE can be diagnosed at the initial endoscopy as long as the biopsy meets the threshold, which means faster diagnosis for many people.
Treatment Options and What to Expect
Treatment follows three main paths, and current guidelines recommend shared decision-making between you and your doctor to choose the best starting point.
- Dietary elimination: Starting with removal of one or two food groups (typically milk first, then wheat) and repeating endoscopy to check for tissue healing. If inflammation resolves, you’ve identified the trigger. If not, additional foods are eliminated in a stepwise fashion.
- Medication: Acid-reducing medications at higher-than-standard doses, or topical steroids swallowed as a liquid or dissolving tablet. These are typically taken after meals or before bed, with nothing to eat or drink for 30 to 60 minutes afterward so the medication coats the esophagus.
- Dilation: If narrowing has already developed, a procedure to gently stretch the esophagus can improve swallowing relatively quickly. This is done alongside anti-inflammatory treatment, not as a replacement for it.
For patients who don’t respond to initial treatments, a newer biologic medication that blocks key immune signals involved in the allergic response is available as a step-up option. Because EoE is chronic, most patients need ongoing maintenance treatment, whether dietary or medication-based, to keep inflammation in check and prevent the structural damage that makes swallowing worse over time.