Pilonidal Sinus

Pilonidal Sinus

A pilonidal sinus is a small tunnel or cyst that forms in the skin near the tailbone, often containing hair, debris, and pus. It commonly affects young adults, especially those with excessive hair, prolonged sitting, or poor hygiene. Symptoms include pain, swelling, redness, and sometimes drainage of pus or blood. Causes include hair penetration into the skin, friction, and infection. Treatment options range from maintaining cleanliness and hair removal to antibiotics and surgical drainage in severe cases.