Mucus, a fluid in your upper respiratory system, is usually clear. But a number of health conditions can cause it to turn brown. Also known as brown phlegm or sputum, brown mucus can be due to a range ...

Your body produces mucus naturally to protect your respiratory system, and under normal circumstances, this protective fluid remains clear and relatively thin. However, when mucus suddenly changes to ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." It’s never any fun feeling under the weather, but when a common cold is paired with excess phlegm, it ...

When you're sick you'll often produce more phlegm, and might notice it's thicker or a different color: white, green, yellow or maybe even brown. We all produce mucus, even when healthy. Mucus is a ...

Chest congestion can be a symptom of an acute illness or a chronic underlying health condition. Common causes include flu, asthma, and COPD. Chest congestion is often a symptom of an acute illness.

Chronic obstructive pulmonary disease (COPD) affects approximately 29 million people in the U.S. and is the fourth leading ...

Lung cancer is the second most common cancer among men (behind prostate cancer) and women (behind breast cancer) in the United States, according to the American Cancer Society. Nearly a quarter of a ...

Postural drainage is a form of physical therapy that can help people expel excess fluids from the body. It is particularly helpful for people with cystic fibrosis. Postural drainage is a technique ...