Causes of anal pain if from a surgical point of view, the more common in addition to anal fissure, is in the relief of stool, if constipation, stool is relatively dry, in the passage through the anus will cause damage to the mucous membrane of the anorectum, causing bleeding, called anal fissure. There may also be hemorrhoids, hemorrhoids are mainly due to the venous plexus at the anus, the formation of varicose veins in the local area, so there will be some tissue discharged from the anus, prolapse outside the anus, and in the bowel movement will appear to have a painless anal bleeding, this situation is generally no obvious pain. If it is obstetrics and gynecology causes anal pain, may be due to the so-called anal swelling, is in the pelvis there is some pelvic fluid inside the stimulation, or inflammation of the tissue, for the anorectal stimulation caused by the anal area of the swelling-like pain. Then there is the female pelvic endometriosis, due to endometriosis foci planted in the uterine sacral ligament parts, especially when menstruation to stimulate the sacral nerve will cause pain in the anus. Therefore, what exactly causes anal pain can be clarified by examination of the anal appearance, anal palpation and gynecological triple diagnosis examination.