A disorder of the sinuses surrounding the nose, wherein which one or more of these sinuses are inflamed. Acute sinusitis typically lasts 3 to 8 weeks, whereas chronic sinusitis lasts longer. A disorder of the sinuses surrounding the nose, where one or more of these sinuses are inflamed. Acute sinusitis typically lasts 3 to 8 weeks, whereas chronic sinusitis lasts longer.
Nasal sinuses are small mucous-lined pockets within the facial bones surrounding the nose.
Nasal sinuses are small mucous-lined pockets within the facial bones surrounding the nose. Normally, air passes in and out of thethese sinuses make mucus that mucus, and fluid drains from the sinuses into the nose while air passes freely in and out. Any combination of these may cause sinusitis. Acute sSinusitis affects approximately 3 out of 1,000 people, and develops in approximately 31 million Americans alone each year. . It usually follows respiratory infections such as colds Sinusitis typically follows a upper respiratory infection or allergic reaction, which can cause inflammation and swelling that close off the sinus ostia.