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Pilonidal (say "py-luh-NY-dul") disease is a common skin condition. It usually develops at the top of the crease between the buttocks. It may look like a small hole or dimple called a pit. Loose hair and skin debris trapped there can cause an infection or an abscess. It's also called a pilonidal cyst.
The exact cause isn't known. But it may start when skin above the buttocks is stretched as a person sits or bends. Loose hair and skin debris can get caught in an enlarged skin pore, creating a cyst. If the cyst gets infected, it can form a pocket of pus called an abscess.
You may have no symptoms. But if the cyst gets infected, you may have redness or swelling in the area. You may also have a fever. You may have cloudy fluid or blood draining from the cyst. Some people may find it hard to walk or sit because of the pain.
A physical exam of the buttocks is usually all doctors need to diagnose pilonidal disease. You probably won't need any other tests unless the area doesn't heal or your doctor thinks there may be another problem.
While you are being treated for an infected cyst:
For cysts that are not causing symptoms or after you have had surgery to remove a cyst:
Keeping the area free of hair may also help. Talk with your doctor about what they recommend.
Current as of: November 16, 2023
Author: Healthwise StaffClinical Review BoardAll Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
Author: Healthwise Staff
Clinical Review BoardAll Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
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