Article: Hollow feeling: Sinus infections plague millions of us

If you can't seem to shake that cold, if you've been dragging for weeks and your face feels like it has been encased in concrete, odds are you don't have a cold.

Instead, you probably have a sinus infection. If you do, you're hardly alone: An estimated 37 million Americans or more a year suffer at least one episode of sinusitis, or sinus infection.

The good news: There are ways to ward off sinusitis. And ways to treat it once it has struck.

What is it? When sinuses become inflamed and unable to drain properly, the mucus, which normally cleans and moisturizes your nasal passages, becomes trapped and a bacterial infection can develop.

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