Stool with mucus may be caused by dietary factors, or may be caused by inflammatory bowel disease, bacillary dysentery, colorectal cancer and other diseases. 1. Dietary factors: If patients consume more high protein and high fat food in a short time, and usually consume excessive greasy and cold food, such as fried chicken, marinated meat, ham sausage, ice cream, etc., which exceeds the digestive and absorptive capacity of the gastrointestinal tract, it will lead to the inability of complete digestion and absorption of the food, and dyspepsia, which can lead to the manifestation of mucus in the stools. 2. Inflammatory bowel disease (IBD): a chronic inflammatory disease of the intestinal tract caused by a combination of environmental, genetic, infectious, and immunological factors, which can lead to the symptoms of mucus in the stool, and can be accompanied by abdominal pain, diarrhea, and other symptoms. 3. Bacterial dysentery: when suffering from bacterial dysentery, the causative factors can repeatedly stimulate the intestinal lining and the villi of the large intestine, leading to the intestinal secretion of mucus more than the normal range, and the phenomenon of mucus stool will appear eventually. 4. Colorectal cancer: Changes in defecation habit and fecal character, such as abdominal pain, diarrhea, mucus, pus and blood in stool, etc. are possible. When there is mucus in stool, it is recommended to go to the hospital and ask the doctor to make judgment and clarify the cause of the disease.