If blood is found during defecation, there are several possible causes: First, constipation: it may be due to constipation, which cuts the rectal mucosa causing bleeding. Second, hemorrhoids: It may be caused by hemorrhoids, usually bleeding after defecation, and fresh blood, if it is internal hemorrhoids, there is no obvious pain, and if it is external hemorrhoids, it will also be combined with pain after defecation. If it is more serious hemorrhoids, especially internal hemorrhoids, there may be anal swelling prolapse after defecation. Thirdly, rectal malignant tumor: If you find blood during defecation, it may also be caused by rectal malignant tumor. This condition is mucopurulent stool, that is, blood and stool mixed together, the amount of bleeding is not very large and recurring, and the patient appears bleeding intermittently. If you find blood in the stool, it is recommended to go to a regular specialized hospital for systematic examination and clear diagnosis.