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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 diseases.

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 health professional if an anorectal abscess is suspected. Treatment is necessary to prevent worsening of the infection and serious illness.

Author Jeannette Curtis
Author Caroline Rea, RN, BS, MS
Editor Kathleen M. Ariss, MS
Editor Susan Van Houten, RN, BSN, MBA
Associate Editor Tracy Landauer
Associate Editor Pat Truman
Primary Medical Reviewer Patrice Burgess, MD
- Family Medicine
Primary Medical Reviewer Adam Husney, MD
- Family Medicine
Primary Medical Reviewer Kathleen Romito, MD
- Family Medicine
Last Updated May 25, 2007

WebMD Medical Reference from Healthwise

Last Updated: May 25, 2007
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.