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

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 ...

YES, BOOGERS AND mucus are gross. But, they serve a very useful purpose. The thick, sludgy substance—made up of mostly water, salt, and antibodies—is designed to help capture and clear bacteria and ...

If you’ve ever fought a cold or infection in the past, chances are you’ve had the not-so-pleasant experience of coughing up green phlegm. Along with a runny nose and sore throat, green phlegm is ...

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, ...

Mucus is a thin, slippery fluid that lines the nose, throat, and other passages to trap dust and germs. Phlegm is a thicker type of mucus produced in the lungs to catch and remove harmful particles ...

It’s not uncommon when you develop a hacking cough from deep down in your lungs to cough up a gel-like substance known as phlegm, or sputum. While you may think nothing of it, simply associating it ...

Mucus, or phlegm, is a thick, slippery substance secreted by glands and cells in your body. It’s important to your immune system because it traps microorganisms, dirt, and other particles that shouldn ...

It is not unusual to cough up phlegm with a common cold. However, it can also indicate a different, sometimes serious, underlying condition such as stomach acid reflux, lung disease, or heart disease.

Struggling through a nasty round of bronchitis with little better to do than binge watch Netflix and feel epically sorry for myself, I pondered the ageless cold-and-flu-season question: Phlegm. Why?