What phlegm can tell you about your health – and when to see a doctor

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

What Does the Color of My Phlegm Mean?

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 ...
Woman's World on MSN

Snot Color Meanings: Green? Pink? Black? Here's When to See a Doctor

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

What does the colour of your phlegm mean? From a cold to pneumonia and even lung cancer we break down how the hue of your mucus reflects your health

As the icy weather approaches, many start coughing and spluttering while they battle winter colds and flu. Although for most coughing up mucus is part of the cold season, coloured phlegm can be a sign ...