Abstract
A 3 1/2-month-old male infant presented with hematemesis due to erosive gastritis following whole-cowʼs-milk feeding. The presence of eosinophilic gastritis, the disappearance of symptoms after withdrawal of whole-cowʼs-milk feeding, and the association with facial eczema suggest that gastritis was induced by cowʼs milk. Cowʼs-milk intolerance should be considered in the etiologic differential diagnosis of hematemesis and gastritis in infancy.