Bowel cancer is not necessarily caused by bleeding without stool, but may also be caused by hemorrhoids, anal fissure, etc. It is suggested that patients should go to the hospital in time, and according to the doctor’s instruction, complete the examination of routine stool, rectal finger test, colonoscopy, etc. to clarify the cause and then treat. 1. Bowel cancer: usually caused by heredity, long-term smoking or drinking, etc. It may have symptoms such as indigestion and abdominal pain. If the site of the disease is close to the rectum and the bleeding of bowel cancer is large, it will be easy to bleed without stool, which can be treated by surgical resection. 2. Hemorrhoids: may be caused by sedentary, constipation and other reasons, manifested as anal pain, itching and other symptoms, when the pressure of hemorrhoidal veins increases, not stool will cause bleeding due to self-rupture. Can be used under the guidance of the doctor anus tai, musk hemorrhoid suppository and other drugs for treatment. 3. Anal fissure: usually due to dry stool, spasm of the internal sphincter and other reasons, resulting in too much force, so that the anal canal skin rupture, thus triggering anal fissure, may not appear to pull out of the stool light bleeding symptoms. It can be treated by anal fissure resection or anal sphincter amputation. Patients should seek timely medical diagnosis when bleeding without stool to avoid delaying the condition.