Pilonidal disease is a chronic skin infection in the crease of the buttocks, marked by cysts in this area. A pilonidal cyst is a round sac of tissue filled with air or fluid that often looks like a pimple at the bottom of your tailbone. Pilonidal cysts are thought to be caused by infected hair follicles in this area.

Signs & Symptoms:

• If a pilonidal cyst gets infected, you may experience redness, swelling, pus or blood draining from the abscess, or pain when you walk or sit.

Treatment Options:

Your doctor may need to open and drain the cyst, or you may need surgery to remove the cyst altogether for recurring infections.