Symptoms of infant milk powder allergy: Infant milk powder allergy refers to the physical discomfort caused by the baby\’s overreaction to one or more ingredients in milk powder. The most common symptoms include rash, vomiting, diarrhea, crying, sneezing, skin itching, etc. If left untreated, allergic reactions may lead to more serious symptoms, such as asthma and anaphylactic shock. 1. Skin symptoms The most common symptoms of infant formula allergy are skin itching, erythema and eczema. The rash typically appears on the face, neck, and chest, and sometimes on the abdomen, groin, and buttocks. The rash is usually red or pink in color, a little rough to the touch, and may be accompanied by