Nose and Sinus Disorders

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13 Sneaky Causes of Sinus Infections

Sinus infections, the cause of untold misery, strike about 37 million people in the U.S. each year. Here are 13 things that can cause an acute sinus infection.

What Is Mucus? 9 Questions You've Always Wondered About Snot and Phlegm

If you've ever wondered what snot actually is (and where it even comes from), we've got you covered.