Stool with pus and no blood may be caused by bowel cancer, or it may be caused by enteritis and other diseases. 1. Bowel cancer: the typical symptoms of patients are mucus, pus and blood in stools, acute and heavy stools, constipation, thinning of stools, etc. In the early stage of bowel cancer, there is no obvious clinical manifestation, if there is pus without blood in stools, the first thing to be considered is enteritis, intestinal polyps and other diseases, but bowel cancer can not be ruled out. 2. Enteritis, intestinal polyps: the common symptoms of this kind of disease are diarrhea, pus stool, abdominal pain, etc. This phenomenon is mostly caused by inflammatory substances infecting and stimulating the intestinal mucosa. The above two diseases are mainly diagnosed by colonoscopy and confirmed by pathological biopsy, and patients are advised to go to the hospital as early as possible.