Constipation anal bleeding is mostly caused by anal fissures, hemorrhoids, anal fistulas and other causes, while constipation is an important cause of the onset and aggravation of these diseases, should go to the Department of Proctology to identify the cause, treat the relevant diseases and relieve constipation. 1, anal fissures: anal fissures cause painful bleeding during defecation caused by fecal stimulation, which can be relieved for a few minutes after defecation, and then severe pain caused by internal sphincter spasm, which can last from half an hour to several hours. The treatment is based on the correction of constipation, potassium permanganate sitz bath, if the effect is not good or pain, bleeding serious, surgery can be taken; 2, anal fistula: anal fistula pus drainage is poor, accumulated in the perianal area causing pain, bleeding, anal fistula formation will not heal itself, need to use surgery; 3, hemorrhoids: when the internal hemorrhoids or mixed hemorrhoids prolapse, infection, necrosis will produce pain, bleeding, can be injected Sclerotherapy or surgery can be used. In addition to symptomatic treatment for the cause, patients also need to improve their lifestyle, pay attention to regular work and rest, appropriate exercise such as jogging, walking or doing gymnastics. Eat more food rich in dietary fiber, such as celery, spinach, cabbage, etc. Drink more water, you can drink some honey water. Have regular bowel movements every day to develop good habits.