An anal abscess is a pus-filled pocket located in the spaces around the anus and rectum. The abscess can be found near the surface of the anal opening or deeper in the rectum.
An anal abscess is caused by a bacterial infection. Infection may occur when there is a blockage in one or more of the anal glands that secrete mucous, or from an anal fistula.
Anal absesses are more common in men. Other factors that may increase your chances of an anal abscess:
Symptoms depend on where the abscess is located. An anal abscess may cause:
Complications of an anal abscess may include:
Your doctor will ask about your symptoms and medical history. A physical exam will be done. An abscess near the surface of the skin may be visible. A deeper abcsess may require a digital rectal exam. The doctor will feel the inside of the anal canal for any abnormalities.
Imaging tests to look at anorectal structures are not usually needed, but may include:
Surgical drainage is necessary to treat an anal abscess. The type of procedure depends on its location and depth. It is possible that you may have a drain in the wound for up to 3 weeks to help the healing process.
American College of Gastroenterology
American Society of Colon and Rectal Surgeons
Canadian Association of Gastroenterology
Canadian Society of Colon and Rectal Surgeons
Anal rectal abscess and fistula. Hemorrhoid website. Available at: http://www.hemorrhoid.net/abscess.php. Accessed December 18, 2017.
Anal abscess and fistula expanded information. American Society of Colon and Rectal Surgeons website. Available at: https://www.fascrs.org/patients/disease-condition/abscess-and-fistula-expanded-information. Updated October 2012. Accessed December 18, 2017.
Anorectal abscess. Johns Hopkins Medicine website. Available at: https://www.hopkinsmedicine.org/healthlibrary/conditions/adult/digestive_disorders/anorectal_abscess_134,175. Accessed December 18, 2017.
Fistula in ano and anorectal abscess. EBSCO DynaMed Plus website. Available at: http://www.dynamed.com/topics/dmp~AN~T115485/Fistula-in-ano-and-anorectal-abscess. Updated October 11, 2017. Accessed December 18, 2017.
Last reviewed December 2017 by EBSCO Medical Review Board Michael Woods, MD, FAAP
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.