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If your throat and skin become dry in the winter months, having a humidifier may help that. But for many people, having a humidifier does more harm than good-because they get lazy about maintenance. Humidifiers must be cleaned regularly, or they'll form a cesspool of water that grows mold and fungi-and you'll end up breathing in that stuff.

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YOU: The Owner's Manual, Updated and Expanded Edition: An Insider's Guide to the Body that Will Make You Healthier and Younger
Between your full-length mirror and high-school biology class, you probably think you know a lot about the human body. While it's true that we live in an age when we're as obsessed with our bodies as...
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.