A growing number of children and adults have Eosinophilic Esophagitis. Commonly abbreviated as EoE, Eosinophilic Esophagitis is a chronic inflammatory process affecting the esophagus (the tube connecting the mouth to the stomach). This inflammation is caused by a type of white blood cell, known as an eosinophil, that reacts in an allergic fashion to the lining of the esophagus. These cells remain in the esophagus causing damage, despite acid blocking medications that are traditionally used to treat heartburn like symptoms. This injury and inflammation within the esophagus can cause many symptoms.