If you suffer from chronic constipation, there will be bleeding in the stool, which is usually seen in the following cases: a. Long-term constipation can lead to anal fissures and hemorrhoids, both of which will cause anal pain during defecation and a small amount of bleeding on the stool. Second, long-term constipation can induce malignant tumors of the rectum in severe cases, which can also lead to blood on the stool during defecation. Therefore, you should not take it lightly when you find bleeding in the stool. You should go to the anorectal department or gastroenterology department of a regular hospital as soon as possible to identify the cause and actively carry out effective treatment. If it is an anal fissure, it is still relatively easy to cure, but for more serious hemorrhoids and malignant tumors of the rectum, surgical treatment is required.