Eosinophilic Esophagitis (EoE)
The short answer
Eosinophilic esophagitis (EoE) is a chronic allergic condition where white blood cells (eosinophils) build up in the lining of the esophagus, causing inflammation and swelling. In babies, it can cause feeding difficulties, vomiting, poor weight gain, and irritability. EoE is diagnosed by endoscopy with biopsy and is managed with dietary elimination, medications, or a combination of both.
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By Age
What to expect by age
0-3 months
EoE is uncommon but possible in very young infants. Symptoms may mimic severe reflux and include frequent vomiting, feeding refusal, arching during feeds, and poor weight gain that does not respond to standard reflux treatment. If your baby has persistent feeding difficulties that do not improve with reflux medication or formula changes, your pediatrician may consider a referral to a pediatric gastroenterologist.
3-6 months
Babies with EoE may show increasing feeding aversion, significant spit-up or vomiting, and failure to thrive. They may be particularly fussy during or after feeds. Unlike typical reflux which improves with age, EoE symptoms may persist or worsen. If your baby isn't responding to standard reflux treatment, ask your pediatrician about further evaluation.
6-12 months
As solids are introduced, EoE may become more apparent. Babies may gag, choke, or refuse textured foods. Vomiting may increase with the introduction of specific foods. Many children with EoE also have other allergic conditions like eczema, food allergies, or asthma. Diagnosis requires an upper endoscopy with biopsies showing elevated eosinophils in the esophageal tissue.
12 months+
Toddlers with EoE may refuse to eat, prefer liquids over solids, vomit frequently, or have episodes of food becoming stuck (impaction). They may self-limit to soft, easy-to-swallow foods. Treatment options include proton pump inhibitors, swallowed topical corticosteroids, and dietary elimination of trigger foods. Regular monitoring with endoscopy is typically needed to assess treatment response.
What Should You Do?
When to take action
- Baby has occasional spit-up that is not forceful and is gaining weight well
- Baby gags occasionally when learning to eat new textures during solid food introduction
- Baby goes through brief phases of preferring certain foods over others
- Baby has mild reflux that improves with age and positioning changes
- Baby has persistent vomiting or reflux that does not respond to standard reflux treatment
- Baby is refusing feeds, eating very little, or not gaining weight appropriately
- Baby has other allergic conditions (eczema, food allergies) and ongoing feeding difficulties
- Baby or toddler has food stuck in the esophagus and cannot swallow or is drooling excessively -- seek emergency care
- Baby is severely dehydrated from persistent vomiting with sunken fontanelle, no tears, or very few wet diapers
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
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Related Feeding Concerns
When to Introduce Allergens to Baby
Current guidelines recommend introducing common allergens (peanut, egg, cow's milk products, tree nuts, wheat, soy, fish, shellfish, sesame) starting around 4-6 months when your baby is developmentally ready for solids. The landmark LEAP study showed that early introduction of peanuts (by 4-6 months) reduced peanut allergy risk by 80% in high-risk infants. Do not delay allergens - the old advice to wait until 1-3 years has been reversed because early exposure actually prevents allergies.
I'm Worried My Baby Is Aspirating During Feeds
Aspiration means liquid or food enters the airway instead of the stomach. Occasional coughing during feeds is common and does not usually indicate aspiration. True aspiration is less common and may present as recurrent respiratory infections, a wet or gurgly voice after feeds, or chronic cough. If you are concerned, a swallow study can provide a definitive answer.
When Does My Baby Need Amino Acid Formula?
Amino acid-based formulas (also called elemental formulas) are prescribed for babies with severe cow's milk protein allergy, multiple food protein intolerances, or conditions like eosinophilic esophagitis who cannot tolerate standard or extensively hydrolyzed formulas. They are the most hypoallergenic formula available because the proteins are broken down into individual amino acids, making allergic reactions virtually impossible.
Could My Baby Be Aspirating During Feeding?
Aspiration occurs when food or liquid enters the airway instead of the esophagus. Signs include coughing or choking during every feed, a wet or gurgly voice after eating, recurrent chest infections, and breathing changes during meals. Silent aspiration can occur without obvious coughing. If you suspect aspiration, contact your pediatrician as a swallowing study can diagnose it.
Baby Biting Nipple While Nursing
Biting during breastfeeding is a common challenge, especially when babies start teething. It can be startling and painful, but it is almost always a phase that can be managed. Babies cannot actively nurse and bite at the same time because their tongue covers the lower teeth during proper sucking. Biting typically happens at the beginning or end of a feed when the latch is not active. With some gentle strategies, most babies learn quickly that biting ends the feeding session.
My Baby Keeps Clamping Down on the Spoon
Clamping down on the spoon is very common, especially during teething or when babies are learning new oral motor skills. It is often a sensory exploration behavior rather than a feeding problem. Using a soft silicone spoon and placing food on the front of the spoon can help.