Minor blood in the stool is seen in the following areas: first, blood in the stool from hemorrhoids, which is more common and mostly comes out bright red after the stool. The second, anal fissure bleeding, which is characterized by severe pain and bleeding during the stool, can be relieved after the stool, old anal fissure can only show pain during the stool, without obvious bleeding phenomenon. The third, anal papilla hypertrophy, hypertrophy of the anal papilla will appear bleeding under the scraping of stool, anal finger diagnosis can touch the tough swelling near the dentate line. Fourth, rectal polyps, clinical symptoms mainly include mucus and blood stool, blood mixed with stool, change in bowel habits, constipation or diarrhea, occasional abdominal pain, bloating and other discomforts. Fifth, rectal cancer, rectal cancer occurs in elderly patients, often manifested as changes in bowel habits and stool characteristics, mucus-purulent stool, the feeling of urgency, can be judged by rectal finger diagnosis, finger diagnosis can touch the bumpy mass, cauliflower-shaped hard.