Stool with pus is mainly considered to be intestinal diseases, common intestinal tumors, intestinal inflammatory diseases, etc., as follows: First, intestinal tumors: intestinal tumors will be localized erosion, ulceration, which will lead to pus on the surface of the stool, and will also trigger changes in bowel habits, such as diarrhea, mucus stool. Some tumors can also lead to intestinal obstruction, which can cause abdominal pain, bloating and other symptoms. Second, intestinal inflammatory diseases: for example, ulcerative colitis, Crohn’s disease, etc., can also lead to pus in the stool, usually manifested as mucus stool, mucus, pus and blood, etc., which will be accompanied by symptoms of acute and severe pain, diarrhea, and so on. In addition, there may also be intestinal bacterial infections caused by the symptoms, patients need to go to the hospital when necessary for routine fecal and colonoscopy, clear causes and then take appropriate treatment.