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 ...

The buildup of excess mucus in your nasal passages and throat is a common and uncomfortable symptom of many illnesses. JDawnInk via Getty Images Being sick with a cold or other congestion-causing ...

Barking out a loud cough in the middle of a big meeting or on a quiet train car is enough to make you want to be invisible. But trying to stifle your cough is way worse than dealing with any possible ...

Phlegm buildup in the lungs and throat is a common problem, especially during colds, allergies, pollution exposure, or respiratory infections. Phlegm is a thick mucus produced by the respiratory ...

That persistent feeling of mucus dripping down the back of your throat or constant need to clear your nose isn’t just annoying — it’s a condition called catarrh that affects millions of Americans.

Many of us have experienced the feeling of mucus trapped in our nose or throat. The sensation can sometimes lead to discomfort or a constant urge to swallow or clear your throat. This condition is ...

Healthy phlegm is usually clear and runny, but many different health conditions can change the consistency or color. Phlegm, also called sputum, is mucus produced by your lungs that helps protect your ...