After diarrhea the next day without defecation may be diarrhea caused by the gastrointestinal tract food residue caused by physiological factors, may also be caused by the irritable bowel syndrome, intestinal flora imbalance and other pathological factors. 1. Physiological factors: usually during diarrhea eating will be reduced, and due to diarrhea when the intestinal peristalsis accelerated, resulting in a large number of gastrointestinal contents are discharged, so that the gastrointestinal tract of the food residue will be reduced to form the amount of fecal matter will be reduced, so that diarrhea the next day does not defecate the situation. 2. Pathological factors: gastrointestinal diseases such as irritable bowel syndrome, intestinal flora imbalance, colon cancer, etc., will make the patient experience gastrointestinal dysfunction, which manifests itself as diarrhea and constipation alternating episodes. Patients may experience constipation episodes after diarrhea, resulting in no bowel movement the next day after diarrhea. It is recommended to seek timely medical treatment for the above symptoms, to clarify the cause of the disease under the guidance of professional physicians, and to carry out targeted treatment to avoid delaying the condition.