Pilonidal cysts typically develop above the cleft of the buttocks. These swollen lumps contain hair or other debris. They occur when small holes in the skin, known as pilonidal sinuses, become ...

Experts don’t agree on exactly what causes pilonidal cysts. If you sit for prolonged periods or wear tight clothing, you may be at higher risk of getting these cysts. (5) Some believe ingrown hairs ...

A pilonidal sinus is a small hole or tunnel in the skin that can easily become infected. It typically forms in the cleft at the top of the buttocks. When a pilonidal sinus becomes infected it can turn ...

Pilonidal sinus—also called a pilonidal cyst—is a skin infection that occurs in or around the crease of your buttocks. This condition happens when hair, skin cells, and dirt clog a hair follicle, ...