A Pilonidal Sinus is a small tunnel or tract under the skin that usually develops in the cleft at the top of the buttocks. It may contain hair, debris, and skin, and can become infected, causing pain and discharge of pus or blood. It is more common in men, especially those who sit for long periods or have coarse body hair.
If left untreated, the sinus can turn into a chronic condition with recurrent infections, forming painful abscesses. To permanently resolve the issue, Pilonidal Sinus Excision surgery is often recommended.