In TODAY.com's Expert Tip of the Day, a doctor reveals the important clues about your health that can be found in your snot.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." It’s never any fun feeling under the weather, but when a common cold is paired with excess phlegm, it ...

Mucus, a fluid in your upper respiratory system, is usually clear. But a number of health conditions can cause it to turn brown. Also known as brown phlegm or sputum, brown mucus can be due to a range ...

Clear, bubbly phlegm does not typically indicate a problem. However, coughing up large amounts could indicate an underlying health issue, such as fluid in the lungs. Phlegm, or sputum, is a type of ...

Waking up to a dry or sore throat every day isn’t just uncomfortable; it’s your body’s way of flagging that something is off.

I totally endorse the healing qualities of mucus. My doctor wasn’t able to heal my persistent sore throat, so referred me to a specialist who said my throat was sensitive, not inflamed. So there was ...