Baby diarrhea does not necessarily have to change lactose-free milk powder, if lactose intolerance occurs due to diarrhea, need to change lactose-free milk powder, if due to other factors (such as improper feeding, cold, etc.) caused by diarrhea, do not need to change lactose-free milk powder. 1. Lactose intolerance: the baby’s body lacks the ability to synthesize lactase, which can trigger lactose intolerance, resulting in diarrhea in the baby 1 to 2 hours after eating dairy products, and can be accompanied by abdominal distension, abdominal cramps. Parents can switch their babies to lactose-free milk powder and take lactase orally to improve the symptoms. 2. Improper feeding: However, if diarrhea is triggered by irregular feeding and inappropriate amount of food and drink, it is necessary to adjust the feeding method, avoid frequent breastfeeding, and the amount of milk should be controlled at regular intervals. 3. Cold: If the baby’s abdomen is cold, it will stimulate gastrointestinal peristalsis to accelerate, triggering diarrhea, parents should give the baby to do a good job to keep warm, add or subtract clothing as appropriate, to avoid overheating or cold, so as not to make the baby uncomfortable. Baby diarrhea there are other factors, such as infectious diarrhea, etc., need to consult a doctor in a timely manner, to clarify the cause of diarrhea, after the treatment of the cause. The above medication should be used under the guidance of a doctor.