What are the symptoms of infant milk powder allergy? Milk powder is one of the essential foods for babies during their growth and development. However, some babies may be allergic to milk powder. Milk powder allergy is an abnormal immune response in babies. The allergic state manifested when eating milk powder brings great trouble to parents. This article will introduce in detail the manifestations and symptoms of infant formula allergy. 1. Gastrointestinal discomfort The early symptoms of infant milk powder allergy are usually gastrointestinal discomfort, including abdominal pain,