Children with known skin, food and respiratory allergies should be screened for an emerging, chronic food allergy called eosinophilic esophagitis (EoE), a painful inflammation of the esophagus, the food tube between the mouth and stomach. Pediatric allergists who analyzed a very large group of children from birth to adolescence say that EoE should be considered a later component of the ‘allergic march’ — the natural history in which many children successively develop a series of allergies.