There are many causes of anal pain during stool, the first one may be anal fissure, if the patient has a dry stool, it is easy to damage the skin of the anal canal thus causing fissures. The pain is usually cyclical and can be relieved half an hour after defecation. The second patient has previous hemorrhoids, if the bowel movement is difficult, constipation, easily lead to the varicose veins of the hemorrhoid plexus stasis, congestion and thus the formation of hemorrhoids, resulting in pathological hypertrophy of the anal cushion, down from the prolapse of the anus and the formation. Especially after eating a lot of stimulating food such as chili or drinking alcohol, hemorrhoid vein congestion can easily aggravate hemorrhoids, which can lead to hemorrhoid vein stasis to form a thrombus, resulting in pain around the anus when defecating more serious. Therefore, there are many reasons for anal pain during defecation, and its cause should be analyzed, combined with anal visualization, rectal diagnosis, and if necessary, anoscopy can be placed to clarify the diagnosis.