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Anorectal abscess

An anorectal abscess is a pocket of pus in the tissue near the end of the rectum (anus). Most abscesses are caused by a blocked anal gland that develops an infection.

Other possible causes of an anorectal abscess include:

Infection in an anal fissure.
Complications of diseases that affect the colon, such as Crohn's disease, inflammatory bowel disease, or diverticulitis.
Sexually transmitted infections.

Symptoms of an anorectal abscess include:

A painful swelling (mass) around the anus.
Drainage of pus from the anus.
Fever.
Pain in or around the anus.
Pain when passing stool.

A person should see a doctor if an anorectal abscess is suspected. Treatment is needed to prevent worsening of the infection and serious illness.

Current as of: November 16, 2023

Author: Ignite Healthwise, LLC Staff

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All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.