Your body naturally makes mucus to protect organs like lungs and eyes. But infections, allergies and pollution can boost mucus production. Know what it does, when to worry and how to ease discomfort.

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, ...

Mucus in your chest isn’t just gross, it can actually make you feel miserable. When it starts building up in your chest, it ...

Phoebe Williams receives funding from the National Health and Medical Research Council, the Medical Research Future Fund, and the Gates Foundation. Niall Johnston does not work for, consult, own ...

Phlegm that appears bright red, reddish, or rust-colored is a little bit more concerning. "If the color is reddish or rusty, ...