Sinus Infection (Sinusitis): Causes, Symptoms Treatment 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 and other symptoms
Chronic sinusitis - Symptoms and causes - Mayo Clinic Chronic sinusitis causes the spaces inside the nose and head, called sinuses, to become inflamed and swollen The condition lasts 12 weeks or longer, even with treatment
Sinus Infection: Symptoms, Causes, and Treatment - Healthline 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 symptoms are gone
Sinusitis - Johns Hopkins Medicine 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 sinus infection can happen after a cold The cold inflames the nasal passages This can block the opening of the sinuses and lead to
Sinusitis - Harvard Health The sinuses are the hollow cavities behind the facial bones around the nose and eyes The mucus they produce helps trap foreign particles like dust and bacteria and moistens the nasal passages