Secondly, abdominal pain and bleeding stools can also occur in intestinal tumors, and abdominal pain and bleeding stools can be induced by tumor erosion and tumor cells’ own secretion. In addition to the two symptoms, these patients may also have changes in bowel habits and stool characteristics, such as mucus-purulent stools, diarrhea, constipation, weight loss and weakness. Colon polyps can also cause abdominal pain, abdominal distension, mucus and blood in the stool and other symptoms. Therefore, in order to clarify the cause should be early colonoscopy, abdominal pain, blood in the stool also consider perianal abscess, perianal abscess formed when the pelvic abscess will cause abdominal pain, but also cause blood in the stool, but such patients often appear symptoms of pus and blood, and accompanied by fever, pain and other discomfort.