Black mucus is rare. It can be the sign of a fungal infection, or exposure to pollutants such as coal, dust or cigarette ...

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.

A medical expert revealed the significance of different nasal mucus colors, which help determine when you should consult a ...

When you’re sick, you’ll often produce more phlegm, and might notice it’s thicker or a different colour: white, green, yellow or maybe even brown. What can this phlegm – also called mucus, snot, ...