If patients find blood and pus in the stool, the possible causes are as follows: 1, bacterial infection: generally there will be symptoms of mucopurulent stool, that is, blood and pus in the stool. 2, intestinal tumors: such as colon cancer, usually also accompanied by general wasting, weakness, thinning of the stool, as well as intestinal obstruction and other related symptoms. 3, inflammatory bowel disease: such as ulcerative colitis, Crohn’s disease, etc. 4, intestinal tuberculosis: Accompanied by obvious symptoms of tuberculosis toxicity, such as low fever, night sweats, emaciation, weakness, etc.