Chronic sinusitis is a common condition in which the cavities around nasal passages (sinuses) become inflamed and swollen — for at least eight weeks, despite treatment attempts. Also known as chronic rhinosinusitis, this condition interferes with drainage and causes mucus to build up. If you have chronic sinusitis, it may be difficult to breathe through your nose. The area around your eyes and face may feel swollen, and you may have throbbing facial pain or a headache. Chronic sinusitis is one of the more prevalent chronic illnesses in the United States, affecting persons of all age groups (see Epidemiology). It is an inflammatory process that involves the paranasal sinuses and persists for 12 weeks or longer (see Pathophysiology).
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