Generally speaking, when the stool is shaped and falls into the toilet, it is not shaped that suggests that the stool is not shaped, which may be caused by acute gastroenteritis, ulcerative colitis and other reasons. 1. Gastroenteritis: can be triggered by unclean diet, eating cold, greasy or irritating food, resulting in acute inflammation of the gastrointestinal mucosa, abdominal pain, diarrhea, nausea, vomiting and other symptoms, manifested as a bowel movement when shaped and fell into the toilet water inside the unshapely situation. 2. Ulcerative colitis: is a recurrent chronic inflammatory bowel disease, the main affected parts for the rectum, colon, can be caused by environmental, genetic, intestinal immunity and other factors. The main manifestations are persistent or recurrent diarrhea, mucus, pus and blood stools, abdominal pain, and a feeling of urgency and heaviness. Bowel movements may appear to be shaped when they are passed but not when they fall into the toilet water. The above conditions may also be caused by irritable bowel syndrome. It is recommended that patients seek medical attention in a timely manner to clarify the diagnosis under the guidance of a doctor and to carry out targeted treatment.