A higher-than-normal amount of phlegm can build up in your nose, throat, and lungs when you are sick. This build-up may cause coughing and discomfort. Bloody, brown, white, yellow, or green phlegm ...

The COVID-19 virus spreads via mucus once inside an infected airway, allowing it to reach into the lower lungs, according to a Northwestern Medicine study published in Nature Communications.

Coughing up blood, medically known as hemoptysis, involves coughing or spitting up blood or blood-streaked mucus from your respiratory tract (i.e. lungs and airways). Coughed-up blood may appear pink, ...

A chesty cough that lingers with green or yellow ... chesty cough with phlegm that doesn't go away Frequent chest infections Persistent wheezing Bronchiectasis is a chronic lung condition that ...

“Mucus has got a bad rap,” said Dr. Richard Boucher, a pulmonologist and director of the Marsico Lung Institute/U.N.C. Cystic Fibrosis Center at the University of North Carolina at Chapel Hill.

It’s never any fun feeling under the weather, but when a common cold is paired with excess phlegm, it makes matters even ...