Sinus Infection (Sinusitis): What It Is, Symptoms, and More
A sinus infection, also known as sinusitis or rhinosinusitis, happens when your nasal cavities become infected, swollen, and inflamed. Fluid buildup in the sinuses can allow germs to thrive, leading to a sinus infection. Sinusitis is commonly triggered by a virus and can persist even after other upper respiratory symptoms have cleared. Occasionally, bacteria —…