Incomplete (internal) prolapse: the rectum is not yet bulging via the anus.
Mucosal prolapse encompassing only the internal lining of the rectum.
Complete (external) prolapse of the rectum.
What causes prolapse?
The precise cause is not identified. Possible reasons are extreme straining at defecation, a feeble pelvic floor and anal sphincter muscles or a deficiency of fixation of the lower bowel (rectum) to nearby pelvic structures. Rectal prolapse is six times more common in females than in males, but is not connected to childbirth. It is common in initial childhood