Abstract
Neonatal and infantile gastrointestinal allergy is a syndrome that bloody stool, vomiting appears in neonate and young infant mainly after taking cow's milk formula. It is called food protein-induced enterocolitis syndrome in English. The number of patients is increasing rapidly from 1995. We experienced more than 60 cases of this disease since 2001, though pathophysiology, diagnosis, and treatment is not defined yet. In this article, I discussed this syndrome in the aspect of a pediatric allergologist, and described the future perspective.