The reasons for anal pain in early pregnancy are as follows: First, hemorrhoids at the anal opening, after pregnancy because of the slow increase in body weight of pregnant women, while regular long time to do, inactivity will lead to hemorrhoids increasing volume, when pregnant women in the activities will have its feeling. Second, the usual diet is not very good, like to eat more spices or spicy, stimulating food, because it can not be fully absorbed by the gastrointestinal tract, in the anorectal rectum will continue to stimulate the perianal rectum caused by anal cramps. Third, caused by perianal abscess, anal fistula, will be formed in the perianal cavity and a pus cavity and fistula, when the body is infected by inflammation will continue to secrete inflammatory mediators to stimulate the pus cavity caused by pain. Fourth, proctitis, anal fissure, constipation caused by dry stools after passing through the anal opening will pull the anal opening nerve caused by pain.