There are many causes of swelling prolapse after bowel movement, mostly considered to be caused by internal hemorrhoids or rectal prolapse. 1. Internal hemorrhoids: the most common cause is internal hemorrhoids. Internal hemorrhoids are divided into four degrees, the swelling after the bowel movements need to be hand-assisted to return to belong to the third degree, the treatment of conservative treatment, can be externally coated hemorrhoidal cream, such as Ma Yinglong musk hemorrhoidal cream, can be combined with the acacia horn pills and other medications together to treat, but also to be injected into the sclerotherapy, such as eliminating hemorrhoidal injection, etc., the conservative treatment is not good, you can also consider taking the method of surgical excision. 2. Rectal prolapse: the pressure in the abdominal cavity increases during bowel movement, causing the mucous membrane of the rectum or the rectal segment to prolapse downward out of the anus, and in severe cases, it cannot be retrieved. Rectal prolapse need to seek professional doctor maneuver to return to the prolapsed part, if the swelling often occurs out of the anus, can consider surgical treatment. In addition, rectal polyps, anal papilloma and other diseases, may also appear after bowel movement of the swelling out. Therefore, you should go to the anorectal department of the hospital in a timely manner, after a clear diagnosis, follow the doctor’s instructions to be treated accordingly.