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 ...

Phlegm is naturally clear. So, if your phlegm is a different color, such as yellow or green, you may have a viral or bacterial infection. Brown, red, or black phlegm may be a sign of a more serious ...

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

Whether you're dealing with a runny nose, cough or congestion, your mucus can help determine if it's a minor bother like a ...