Anal pain want to discharge stool can not come out, roughly the following reasons: 1, the existence of anal fissure, anal fissure is a common anal disease and dry stool, defecation difficulties, defecation time is long and other factors have a relationship. After the fissure in the anal canal, the symptoms of severe anal pain will occur during defecation, which in turn leads to the patient’s fear of defecation. The stool exists in the rectum for a long time, and water is constantly reabsorbed, so the stool becomes drier and drier, thus forming a vicious circle of anal fissure. The existence of anal fissure can be in the anus local external use of compound keratocyanate cream, potassium permanganate anus local sitz bath can be used to assist defecation; 2, there is the possibility of fecalithiasis, patients with long-term defecation difficulties, the presence of feces in the rectum, water is constantly reabsorption of feces, the more they gather more and more, more and more dry, more and more hard, the compression of the rectum caused by the rectal anus distension and pain. At this time to use the hand will be present in the rectum of the dry hard feces out to solve the fundamental problem; 3, hemorrhoids are particularly serious, ring-shaped embedded mixed hemorrhoids, local inflammation, thrombosis, edema, necrosis, which will result in the anus falling pain discomfort, the same difficult to defecate, which will require surgical intervention to solve the problem.