Pain in the anus during defecation is a condition that is encountered in everyday life. After this happens it is mostly seen in diseases such as present hemorrhoids and anal fissures. 1, after the occurrence of hemorrhoids, due to the swelling prolapse, a time can not be timely retracted into the anus, after the completion of anal defecation, the muscles around the anus contract, so that the anus closed, these prolapsed swelling will be anal compression, causing the swelling blood return is not smooth, appearing embedded, causing pain and discomfort. Some people also have hemorrhoids themselves, excessive forceful defecation, there will be bleeding hemorrhoids hemorrhoids nucleus, these blood flows into the subcutaneous, causing increased subcutaneous tension, causing severe pain. 2, Some people, due to dry stools, cause the skin or different depths of fissures to appear in the anus. This cracked condition, which cannot heal in time, can lead to anal fissures. After the fissure occurs, not only does the pain occur during defecation, which is mainly due to the painful discomfort caused by the increase of the broken wound caused by the pull of the stool on the anus; after the completion of defecation, the stimulation of defecation will lead to strong spasm of the internal anal sphincter, which will also cause severe pain and discomfort. 3, there are also some cases, due to unclean diet, diarrhea resulting in an increase in the number of stools, after the completion of the stool, the non-stop use of toilet paper or other sanitary products on the skin around the anus stimulation can also appear pain. There are various reasons for anal pain in stool, mainly due to some perianal diseases. Treatment should be given promptly to reduce this discomfort.