A 49-year-old male asked:
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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 answer
Dr. Tri Huynh
Dr. Tri Huynh answered
16 years experience in Gastroenterology
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.
Answered on Oct 5, 2013

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