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What causes sinusitis?

Sinusitis usually starts with a viral infection of the nose and sinuses, such as during a cold or the flu. The build-up of mucus during these infections is often enough to trigger an inflammation of the sinus linings.

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About this article

Author: Dr Joanne Van der Velden PhD, BSc (Hons)
First answered: 17 Oct 2014
Last reviewed: 19 May 2018
Rating: 4.0 out of 5
Votes: 638 (Click smiley face below to rate)
Category: The common cold

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