Five months baby diarrhea a few days may be lactose intolerance, viral enteritis, gastrointestinal colds and other diseases caused by the need to take general measures for the cause of the disease, drug treatment. 1. Lactose intolerance: common symptoms include diarrhea, abdominal distension, hyperactive bowel sounds, etc. Parents need to reduce the child’s intake of lactose, the doctor will feel the severity of clinical symptoms using lactose-free or low-lactose milk powder. At the same time, you need to follow the doctor’s instructions to apply bifidobacteria, lactobacillus and other probiotic preparations, and also supplement lactase. 2. Viral enteritis: mainly manifested as abdominal pain, diarrhea, nausea, vomiting and so on. Children need to pay attention to rest and drink enough water. Children need to take montelukast and other antidiarrheal drugs as prescribed by the doctor, but also oral rehydration salts. 3. Gastrointestinal cold: The main symptoms include diarrhea, fever and nausea. Children need to rest in bed, keep the room ventilated and keep warm. The child also needs to follow the doctor’s instructions to apply montelukast. The causes of diarrhea in five-month-old babies for a few days are more than one, you need to go to the hospital and cooperate with the doctor to actively treat the original disease. The above drugs are recommended to be used under the guidance of a doctor, and should not be used blindly on their own, in order to avoid adverse effects.