A pilonidal sinus is a small tunnel that develops at the top of the crease in the buttocks. Trapped hair around the buttocks crease can lead to an abscess, and a pilonidal sinus may develop as a ...

Sinus surgery treats various problems affecting the series of cavities around your nasal passages called the sinuses. There are different types, but the most common is functional endoscopic surgery.

Pain and pressure around your sinuses -- in your forehead, in your cheeks, behind and between your eyes, and above your nose Tenderness when you touch your face Pain that gets worse when you bend over ...