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Overview:
Sinuses are empty cavities within your cheek bones, around your eyes and behind your nose. Their main job is to warm, moisten and filter air in your nasal cavity.

If your stuffy nose and cough last longer than one or two weeks, you may have more than a cold. Sinusitis (pronounced sine-you-SITE-iss) is a swelling of one or more of your nasal sinuses and nasal passages. It is often called a sinus infection.

These brochures are sold in packs of 50. $25