Why does my nose run?

The nose serves as one of the body’s first barriers against infection. Your nose makes more mucus when a foreign substance, such as a virus, enters the body. The increased mucus, combined with increased blood flow to the nose due to an infection, causes your nose to “run” with excess liquid. And it keeps tissue companies in business.

What happens when my foot falls asleep?Ask a Doctor:Why do we shiver?


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