How It Works
6 WHAT THE COLOUR OF YOUR SNOT SAYS ABOUT YOU
Boogers are made up of water and a protein called mucin, which together form a clear gelatinous substance, indicating you’re healthy.
When you’ve got a viral infection, clear mucin builds in the sinuses, and may turn a milky white colour.
If your snot’s turned green or yellow it’s a sure sign you’re developing a cold. This colour comes from the build up of dead white blood cells used to fight infection.
Blowing your nose and seeing brown or orange might have you concerned, but it’s likely just dried blood.
Inhaling pollutants such as smoke or dust could result in some black snot, but it may also be a sign of a fungal infection.