Part One: Understanding the Symptoms of Milk Powder Allergy If your baby develops persistent diarrhea, indigestion, erythema, allergic dermatitis and other symptoms on the skin every time he drinks milk powder, you need to pay attention to whether he is allergic to milk powder. In addition, cough, runny nose or asthma may also be related to milk powder allergy. The manifestations of these allergy symptoms will vary from person to person, and some babies may have mild symptoms or the symptoms may not be obvious for a long time. Therefore, parents should not ignore every detail and be aware of their children\’s discomfort in time, especially the symptoms that appear after drinking milk powder. Part Two: Judgment