Even if it is kind of gross when you're full of it and wrestling with it, phlegm actually serves a useful purpose: The thick, sludgy substance—made up of mostly water, salt, and antibodies—is designed ...

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

Warm tea also helps to open the nasal passages. Hot steam loosens mucus, and tea contains antioxidant compounds known as ...

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.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Having a congested chest can be uncomfortable to say the least. And when you’re feeling under the weather ...

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 ...

For people with conditions such as cystic fibrosis and COPD, mucus can get too thick and sticky; coughing alone can't clear it. Infections develop, leading to severe chronic disease and early death.

Mucus is a perfectly normal fluid that helps to keep our bodies running smoothly, but not all forms of the slimy substance are created equal. People with chronic respiratory diseases tend to produce ...