Bleeding without defecation may be caused by anal fissures or rectal polyps in clinical practice. Since anal fissures appear as small fissures in the skin around the anus, they may cause bleeding from the fissures even when they are not stimulated by defecation, and the amount of bleeding may be more or less. In addition, some rectal polyps prolapse out of the anus from the rectum for a long time and repeatedly, and the repeated stimulation and friction may also lead to fresh blood from the polyps, which must be paid high attention to. In the clinic, when there is anal bleeding, we should go to the hospital in time to do anoscopy or colorectal examination to find the specific cause of bleeding, and then according to the cause of the system, standardized treatment, never blindly apply some hemostatic drugs or some other drugs to treat, so as not to delay the disease.