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.

Coughing up white mucus can mean you have congestion with a respiratory infection such as bronchitis, or it can be a symptom of long-term health issues like chronic obstructive pulmonary disease (COPD ...

Mucus isn't exactly something people give much thought to — until they're sick and dealing with a constantly runny nose. But mucus is actually an important part of a healthy immune system, according ...

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

Whether you’re dealing with a runny nose, cough or congestion, your mucus can help determine if it’s a minor bother like a common cold, allergies or a more serious health issue. That’s right, the ...

DEAR DR. ROACH: Colds and flus seem to linger in my lungs and nose for a week or more after all other symptoms have passed. If my phlegm and mucus are clear or white and I otherwise feel healthy, am I ...

Dear Mayo Clinic: My grandson frequently has a runny nose, and the color of the nasal mucus is sometimes green to yellowish. I’ve heard that this is a sign of a bacterial infection and perhaps the ...