Eosinophilic esophagitis (EE) occurs when there is a high level of eosinophils, a type of white blood cell, in the esophagus (the tube connecting the mouth to the stomach). It can be triggered by food allergies or intolerance. A diet that avoids food proteins (amino-acid based formulas) can help. People with EE may also have have other allergic diseases such as rhinitis, asthma and/or eczema. The condition affects people of all ages and ethnic backgrounds, and in certain families it may be genetic.