Abstract Eosinophilic Gastroenteritis, or better known as Eosinophilic Gastrointestinal Disease, is a rare disease that can affect both children and adults. It is characterized by an eosinophilic infiltrate that can involve the different layers of the digestive tract wall. Its origin is unknown, but most studies suggest that there is an allergic factor. The symptoms depend on the layer of the digestive tract that predominantly affects, and may cause diarrhea, malabsorption, abdominal pain, intestinal obstruction and ascites, among others. Regarding the diagnosis, it is established based on four criteria: gastrointestinal symptoms suggestive of eosinophilic gastrointestinal disease, demonstration of eosinophilic infiltration in one or more areas of the gastrointestinal tract in biopsy, absence of eosinophilic affection of extradigestive organs and absence of parasitic infestation, drugs inducers of eosinophilia and malignancy. The fundamental pillar of treatment is diet, although corticosteroids are sometimes used. Generally its prognosis is good.