Four months baby four times a day stool may be diarrhea, may also be normal stool. 1. belonging to the case of diarrhea: four months baby four times a day, the number of stools is also normal. But if the stool is watery in nature, or with mucus and blood, or thin stool with milk petals and other stool abnormalities, it is a manifestation of diarrhea, which may be accompanied by reduced feeding, vomiting, bloating, irritability and crying and other symptoms. 2. does not belong to the case of diarrhea: if the character of the stool for the yellow sticky soft stool, no mucus blood and other manifestations, and before the usual character of the stool, the mental state is normal, the amount of food is normal, there is no vomiting, simply increase the number of bowel movements, the instant number of times more than usual, but also belongs to the normal stool. Therefore, whether the four months baby four times a day stool belongs to diarrhea, should be judged by the doctor according to the specific conditions.