Sinus infections, or sinusitis, occur when a virus of bacteria enters the sinuses. Read on for a list of common symptoms and treatments.

Disappearing nail bed is a condition in which the nail bed shortens and narrows. It results from prolonged untreated onycholysis. Learn more here.

A new COVID variant called "Nimbus" is spreading. Here's what you need to know about the incubation period, symptoms (including "razor blade throat") and when to take a test.