Babies with milk protein allergy may experience symptoms such as diarrhea, vomiting, coughing, difficulty breathing, skin rashes and itching. Babies allergic to cow’s milk protein may develop a variety of symptoms, such as digestive symptoms, such as diarrhea, constipation, vomiting, etc.; respiratory symptoms, such as coughing, dyspnea, chest tightness, etc.; babies may also develop skin allergy symptoms, such as skin rashes, itching, and angioedema. Babies with the above symptoms should go to the hospital in time in order to clarify the cause of the disease, and under the guidance of the doctor for treatment, appropriate adjustment of dietary structure or change the type of milk drinking.