anal dilatation - A procedure for enlarging the anus. Anal dilatation is used to treat conditions in which the anus becomes too tight, such as anal stenosis and anal fissure.
It is also used to treat haemorrhoids. Anal dilatation is usually performed under general anaesthesia. Reflex anal dilatation, in which the anus dilates in response to local contact, may occur in certain anal disorders or after repeated anal penetration.
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