When a large cylindrical area regularly (or even as a once-off) comes out through the anus it can be very disconcerting - this is called a rectal prolapse. Weak control muscles and prolonged straining contribute to a rectal prolapse and they are most common in elderly women. Prolapse needs to be distinguished from haemorrhoids which are not as pronounced and consist of only the lining of the anus rather than the next piece of the bowel called the rectum as well.
Rectal prolapse repair can be performed but usually a full assessment of you, your anus and pelvic floor and the bowel are required to ensure the right treatment is offered.
A consultation will start things off.