Written By Admin on Tuesday, December 6, 2016 | 10:44:00 PM
A pilonidal sinus (PNS) is a small cyst that appears in the cleft at the top of the buttocks. A PNS ordinarily contains hair, dirt, and wreckage. It can be very painful, not to mention that it can get worse by becoming infected. If it gets infected, it will leak fluid and blood and release the bad odor.