Rectal prolapse occurs when part or all of the wall of the rectum slides out of place, sometimes sticking out of the anus.
Partial prolapse (also called mucosal prolapse): The lining (mucous membrane) of the rectum slides out of place and usually sticks out of the anus. This can happen when you strain to have a bowel movement. Partial prolapse is most common in children younger than 2 years.
Complete prolapse : The entire wall of the rectum slides out of place and usually sticks out of the anus. At first, this may occur only during bowel movements. Eventually, it may occur when you stand or walk. And in some cases, the prolapsed tissue may remain outside your body all the time.
Internal prolapse : Internal prolapse:One part of the wall of the large intestine (colon) or rectum may slide into or over another part, like the folding parts of a toy telescope. The rectum does not stick out of the anus. Intussusception is most common in children and rarely affects adults. In children, the cause is usually not known. In adults, it is usually related to another intestinal problem, such as a growth of tissue in the wall of the intestines