As sniffle season sets in, sinus infections are among the most common illnesses seen in doctors’ offices. For most people, they’re nothing more than an inconvenience and a few days of congestion, but, ...

Pilonidal sinus—also called a pilonidal cyst—is a skin infection that occurs in or around the crease of your buttocks. This condition happens when hair, skin cells, and dirt clog a hair follicle, ...