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 ...

Chae Ruffold, 15, has so far had two failed operations to repair the wound caused by a Pilonidal cyst. The wound, caused by an ingrown hair, is unable to heal due to a genetic condition affecting ...