Sinusitis is an inflammation, or swelling, of the tissue lining your sinuses. Sinuses are structures inside your face that are normally filled with air. Bacterial infections, viral infections and allergies can irritate …

Jan 28, 2025 · A sinus infection occurs when your nasal cavities become swollen, infected, or inflamed. Learn about the symptoms and how to treat them.

Nov 22, 2025 · Sinusitis, also known as a sinus infection, can cause symptoms such as facial pain, congestion, and headache.

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.

Jul 17, 2024 · Discover effective strategies to relieve a sinus headache. Learn about home remedies and treatments that relieve sinus pressure and reduce sinus inflammation.

An infection, growths in the sinuses, called nasal polyps, or swelling of the lining of the sinuses can cause chronic sinusitis. Symptoms might include a blocked or stuffy nose that makes it hard to …

Dec 11, 2025 · Sinus infection (sinusitis) is inflammation of the air cavities behind the nose and eyes. Reviewed by a board-certified infectious disease practitioner.

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.

5 days ago · Many things can block normal nasal drainage, including excess mucus from allergies or an infection, but experts say there are options to help.

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 causes sinusitis? A …