The baby drink milk powder diarrhea, may be related to improper feeding, may also be due to lactose intolerance, milk protein allergy and other reasons caused. 1. improper feeding: due to the small baby gastrointestinal system development is not perfect, the gastrointestinal tract of the digestive ability is relatively poor, if there is improper feeding, one-time to the child to drink too much milk powder, or feeding too often, eat too cold milk powder, may lead to the baby’s diarrhea. 2. Lactose intolerance: It is usually caused by the lack of lactase enzyme in the baby’s body, or insufficient lactase activity. After drinking milk powder can’t break down the lactase enzyme completely, the symptoms of diarrhea will appear. 3. Milk protein allergy: mainly due to the development of the immune system of small children is not yet complete, the development of the intestinal barrier function is not too mature, after drinking milk powder, is likely to cause milk protein allergy, there may be diarrhea symptoms, may also be accompanied by abdominal pain, vomiting and other symptoms. The baby drinking milk powder diarrhea, may also be related to other factors, it is recommended to consult a doctor as soon as possible, after diagnosis of the causative factors, give targeted treatment and adjustment.