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 ...

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

It’s never any fun feeling under the weather, but when a common cold is paired with excess phlegm, it makes matters even worse. This can lead to irritating symptoms, such as coughing, a sore throat, ...

Breathing disorders are common in the U.S. with conditions like COPD affecting some 7% of the population and asthma affecting another 10%. Digestive conditions like GERD, acid reflux, Celiac disease ...

In a lab study, scientists have pinpointed a potential way to "break the inflammatory cycle" of asthma. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

Coughing up blood is usually a cause for concern and should be addressed immediately. Serious conditions that may cause you to cough blood are lung cancer and congestive heart failure. Seek emergency ...

Dupilumab reduces mucus plugging and improves lung function in patients with moderate-to-severe type 2 asthma.

Rising air pollution is more than just an annoyance, it’s a serious threat for people with asthma and COPD. From smoggy ...

Todd Snider died Nov. 14, a day after being diagnosed with walking pneumonia. Here's what to know on the condition.