Sinusitis is an inflammation of the tissues in your sinuses (spaces in your forehead, cheeks and nose usually filled with air). It causes facial pain, a stuffy or runny nose, and sometimes a fever …

Aug 29, 2023 · Overview Acute sinusitis causes the spaces inside the nose, known as sinuses, to become inflamed and swollen. Acute sinusitis makes it hard for the sinuses to drain. Mucus …

Jan 28, 2025 · Fluid buildup in the sinuses can allow germs to grow, leading to a sinus infection. Sinusitis is usually caused by a virus and often lasts even after other upper respiratory …

Nov 22, 2025 · What Is Sinusitis? Sinusitis is an inflammation, or swelling, of the tissue lining the sinuses. Sinuses make mucus, which keeps the inside of your nose moist.

Jun 29, 2025 · Sinusitis (inflamed sinuses) is sometimes caused by an infection, but there are several types (such as chronic or recurrent). Find all the symptoms.

Jul 16, 2025 · Sinus infections, or sinusitis, occur when a virus of bacteria enters the sinuses. Read on for a list of common symptoms and treatments.

Dec 11, 2025 · The sinuses are air spaces surrounded by bone located near your eyes, nose, cheeks, and forehead. The sinuses are lined with mucous membranes that normally produce …

Apr 17, 2024 · When you have a sinus infection, one or more of your sinuses becomes inflamed. Fluid builds up, which can cause congestion and runny nose.

The sinuses are small, empty spaces behind your cheekbones and forehead that connect to the inside of the nose. Sinusitis causes the lining of the sinuses to swell up. This stops mucus …

Sinusitis is inflammation of the sinuses, most commonly caused by a viral or bacterial infection or by an allergy.