Diarrhea in small infants may be caused by viral or bacterial infections, there may also be caused by food allergies, and may also be caused by Kawasaki disease, the causes are different, the treatment is different. 1. Infectious diarrhea: If it is caused by a virus, no special medication is usually needed. If combined with bacterial infection, should follow the doctor to use cefixime, amoxicillin and other antibacterial drugs. Montelukast can also be given to stop diarrhea, and pay attention to hydration to avoid dehydration. 2. Allergic diarrhea: If a baby is allergic to a certain food, the symptoms of diarrhea will also occur, usually no longer in contact with such food, the symptoms will improve. 3. Kawasaki disease: Kawasaki disease is also known as pediatric cutaneous mucocutaneous lymph node syndrome, which can also lead to diarrhea symptoms, but the child can also appear skin rashes, mucosal congestion, fever and other symptoms, treatment can be given to human immunoglobulin and other drugs for treatment. In addition to the above diseases, other diseases can also cause diarrhea symptoms in small infants, it is recommended to consult a doctor in time to identify the cause and ask the doctor to deal with it. All of the above medications should be used under doctor’s supervision, avoid self-medication.