Anal and distal rectal dilation is the act of opening, widening, or stretching the anus with tools called anal dilators. It is often done after surgical procedures on the.
Reflex anal dilation (RAD) is the reflexive dilation of the human anus to a diameter greater than two centimeters in response to the parting of the buttocks or anal.
The anal sphincter is naturally contracted, so dilating involves relaxing those muscles and stretching them. Once it's left alone, the sphincter contracts and goes back to its original diameter after a while, although prolonged, regular stretching can increase that diameter.
Learn about the causes of the sensation of hardness in the anus, Hemorrhoids are dilated blood vessels that form in the anal lining and can.