Dec 14, · Rectal prolapse occurs when a mucosal or full-thickness layer of rectal tissue protrudes through the anal orifice. Rectal Prolapse Treatment & Management. Rectal prolapse is caused by weakening of the ligaments and muscles that hold the rectum in place. In most people with a prolapsed rectum, the anal sphincter muscle. May 13, · I have seen a few videos online of women with a prolapsed anus, this to my eyes looks as though it would be very painful not to mention dangerous.