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 …

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 …

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.

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.

Aug 29, 2023 · Sinuses are cavities around nasal passages. If the sinuses become inflamed and swollen, a person may develop sinusitis.

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.

May 2, 2024 · Sinusitis is present when the tissue lining the sinuses become swollen or inflamed. It occurs as the result of an inflammatory reaction or an infection from a virus, bacteria, or fungus.

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.

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 …

The sinuses are cavities, or air-filled pockets, that are near the nose passage. The sinuses make mucus. This fluid cleans the bacteria and other particles out of the air you breathe. What …