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Pilonidal cyst

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Pilonidal cyst

A pilonidal cyst is a closed sac under the skin at the top of the crease of the buttocks. Pilonidal cysts usually do not cause problems unless they become infected.

The cause of a pilonidal cyst is unclear. They usually occur in men in their late teens through 20s, although they are occasionally noticed at birth as a depression or sometimes as a hairy dimple.

Symptoms of an infected pilonidal cyst (abscess) include:

  • Pain.
  • Swelling and redness.
  • Drainage of pus and/or blood.
  • Fever.

If a pilonidal cyst develops a long-lasting or frequently recurring infection, it is called pilonidal disease. Treatment includes surgical drainage or surgical removal.

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This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.