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A 42-year-old male asked:

Does the anus inflate when passing stool, or does it stay the same form so that when you wipe it feels as it would when it is relaxed?

1 doctor answer1 doctor weighed in
Dr. Tri Huynh
Gastroenterology 18 years experience
Bowel movement: The rectum functions as stool reservoir. As stool being collected in this area, the rectum will be distended to a point of causing you to have urge of bowel movement. Normally, the internal anal sphincter is contracted at rest (when not having bowel movement). When you have urge of bowel movement, the internal sphincter will relax (dilated in a way) for stool evacuation.

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Last updated Oct 5, 2013

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