Sinusitis is the inflammation of the air cavities inside the skull (sinuses), usually due to a virus or a bacterial infection. Acute sinusitis is often caused by the common cold virus and normally goes away on its own in less than 4 weeks. Viral sinusitis is one of the most common reasons for improper prescription of antibiotics. Chronic sinusitis lasts for longer than 8 weeks and affects up to 12% of the general population.[1]
What is sinusitis?
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•Last Updated: May 16, 2025
Sinusitis is the inflammation of the sinuses and is typically caused by a viral or bacterial infection. Acute sinusitis often resolves on its own in less than 4 weeks, and chronic sinusitis lasts longer than 8 weeks and affects up to 12% of the population.