It has been postulated that hair penetrates into the subcutaneous tissues through dilated hair follicles, which is thought to occur particularly in late adolescence, though follicles are not found in the walls of cysts. A sinus develops with a short tract, with a not clearly understood suction mechanism involving local anatomy, eventually leading to further penetration of the hair into the subcutaneous tissue.
Surgery and direct removal of the cyst.
Many scientists are doing research in this field to give better results.
Around 25% people are affected from pilonidal cyst.