Hemorrhoids will hurt after each bowel movement, may be due to the peripheral nerves near the anus are compressed, anal fissure, embedded and other reasons. 1. Nerve compression near the anus: hemorrhoids, external hemorrhoids patients, the good part of the limb innervation area is generally in the limb innervation area, more sensitive to painful stimuli, due to the process of bowel movement, feces will be compressed to the region, due to compression, hemorrhoids near the bowel movement after a painful sensation will be produced. 2. Anal fissure: Since hemorrhoids are caused by swollen veins at the anus. The swollen area of the skin is thin, due to the pressure of the stool is easy to break, and after the stool due to paper wiping more likely to rupture, the breakage of hemorrhoids in the anus leads to anal fissure, so it will hurt after the stool. 3. embedded: hemorrhoids in the internal hemorrhoid patients, due to the more serious condition, easy to defecate on the way out of the hemorrhoid nucleus, and it is difficult to return to their own, so in the anus at the jam, there will be severe pain. For patients with hemorrhoids, once found and accompanied by symptoms should promptly go to the anorectal department for treatment, it is not recommended to delay the condition.