Stool like mud, not shaped, consider the following reasons: First, acute and chronic gastrointestinal diseases: such as acute gastroenteritis, ulcerative colitis, intestinal tuberculosis, intestinal tumors, Crohn’s disease and so on. Second, extra-intestinal factors: such as chronic hepatitis, cirrhosis, hepatocellular carcinoma, cholecystitis, pancreatitis, pancreatic cancer, diabetes mellitus, hyperthyroidism and many other diseases, can cause increased peristalsis, stools more often, unshaped, muddy, and there will be abdominal bloating, acid reflux, belching and other gastrointestinal symptoms, and even steatorrhea. Third, psychological and mental factors: such as gastrointestinal neurosis, mental stress, environmental changes caused by irritable bowel syndrome. When there is a change in the nature and color of the stool, as well as defecation habits, it is necessary to pay attention to further abdominal CT, enteroscopy or intestinal barium contrast and other tests to determine the cause of the disease, so as not to delay the condition.