Red, raised bumps, accompanied by skin darkening is what ingrown hair cysts look like. These can be infected, and pus-filled, ...

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 ...

The wound, caused by an ingrown hair, is unable to heal due to a ... to break down the hair and it becomes the focus of infection. Pilonidal cysts affect 26 in 100,000 people each year, but ...