Elderly people with repeated black blood in the stool are advised to go to the hospital for examination as soon as possible. Because this kind of bleeding with black color in the stool is often a tumor in the intestine, or bleeding in the stomach of the upper digestive tract, it needs to be examined with the help of an e-colonoscope, or an e-gastroscope to clarify the location of the bleeding point. The upper gastrointestinal tract, such as tumors of the stomach, gastric ulcers, or other causes of bleeding from the gastric mucosa. If the cause is colonic, it is likely to be a tumor of the intestine, such as a colon tumor, or inflammation of the colon, which can cause black bleeding. Black bleeding is usually far from the anus, and the blood is digested through the digestive tract, so it turns black, often accompanied by an increase in the number of stools and mucus in the stool, with an abnormal odor. Therefore, the elderly should be taken to the hospital for examination as soon as possible, and then a clear diagnosis should be made and treated as soon as possible.