Baby diarrhea for three days to take medicine is not good, should first find the cause, and then for the cause of the treatment and conditioning. Common causes are improper feeding, pediatric enteritis, lactose intolerance, etc., in the treatment of the main is to correct the bad feeding, the application of drugs for the original disease. 1. Improper feeding: common in the baby just added complementary foods, due to improper feeding, is likely to lead to diarrhea for three days to take medicine is not good. In this case, it is recommended to suspend the addition of complementary foods, to correct the improper feeding methods, in favor of the gradual recovery of the symptoms of diarrhea. 2. Pediatric enteritis: If the baby suffers from pediatric enteritis, resulting in diarrhea three days of medicine is not good. If the bacterial infection, can be directed by the doctor to apply cefixime, amoxicillin clavulanate potassium, with the application of montelukast to stop diarrhea. If there are symptoms of dehydration, oral rehydration salts or intravenous rehydration, to correct the symptoms of dehydration. 3. lactose intolerance: if the baby lactose intolerance, the baby can appear diarrhea, need to give lactase and other treatment. The baby diarrhea for three days to take medicine is not good, it is recommended to consult a doctor as soon as possible. The above medication should be used under the guidance of a doctor.