A preauricular pit is a small hole in front of your ear that you are born with. Most of the time it is harmless and doesn’t cause any health problems. A preauricular pit is a small hole or cyst just ...

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 ...

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, ...