Anorectal abscess

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Rectum

An anorectal abscess is a collection of pus in the anal or rectal region.

Anal abscess; Rectal abscess; Abscess - anorectal

Infection of an anal fissure, sexually transmitted infections, and blocked anal glands are common causes of anorectal abscesses. Deep rectal abscesses may be caused by intestinal disorders such as Crohn's disease or diverticulitis.

The following factors increase your risk for an anorectal abscess:

• Diabetes
• A weakened immune system
• Engaging in anal sex
• Inflammatory bowel disease (Crohn's disease and ulcerative colitis)

The condition may occur in infants and toddlers who are still in diapers and who have a history of anal fissures. The abscess often appears as a swollen, red, tender lump at the edge of the anus. The infant may be fussy from discomfort, but there are generally no other symptoms.

Review Date: 07/14/2006
Reviewed By: J.A. Lee, M.D., Division of Surgery, UCSF, San Francisco, CA. Review provided by VeriMed Healthcare Network.