Sinusitis

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Sinusitis is inflammation of the paranasal sinuses, which may be due to infection, allergy or autoimmune issues. Most cases are due to a viral infection and resolve over the course of 10 days. It is a common condition with more than 24 million cases occurring in the United States annually.[1]

Contents

Classification

By duration

Sinusitis can be acute (going on less than four weeks), subacute (4–8 weeks) or chronic (going on for 8 weeks or more).[2] All three types of sinusitis have similar symptoms, and are thus often difficult to distinguish. Acute sinusitis is very common. Roughly ninety percent of adults have had sinusitis at some point in their life.[3]

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