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 …

Nov 22, 2025 · Learn about the causes, duration, and treatment options for sinusitis in this comprehensive guide.

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 …

Jan 28, 2025 · A sinus infection, also known as sinusitis or rhinosinusitis, occurs when your nasal cavities become swollen and inflamed. Fluid buildup in the sinuses can allow germs to grow, …

Apr 17, 2024 · Sinus Infection Basics Key points Stuffy nose that just isn't getting better? You might have a sinus infection, also called sinusitis. You don't need antibiotics for many sinus …

Detailed information on sinusitis, including causes, symptoms, diagnosis, and treatment.

Jul 11, 2025 · Sinusitis involves inflammation of the paranasal sinuses. It can be caused by viruses, allergies, or autoimmune reactions, leading to mucus buildup and irritation. Symptoms …

Pressure and pain in the sinuses (in different areas of the face or behind the eyes) are the main symptoms of sinusitis. Signs and symptoms of sinus infections depend upon the sinuses that …

Jun 29, 2025 · Allergies, nasal problems, and certain diseases can also cause acute and chronic sinusitis. Symptoms of sinusitis can include fever, weakness, fatigue, cough, and congestion.

Sinusitis - Learn about the causes, symptoms, diagnosis & treatment from the MSD Manuals - Medical Consumer Version.