Phlegm might seem like an everyday nuisance, but it can serve as a critical indicator of your body’s respiratory and systemic ...

This cold and flu season, you may be looking for clues you're getting better anywhere you can find them, even in the color of your snot.

But there’s probably a good reason you have that cough — and it can tell you a lot about what’s going on in your body.

This can cause these substances to turn a much darker color. Smoke can also cause the phlegm in the lungs to thicken. In addition, smoke can damage the hair-like cilia, which help clear the lungs ...

An upper respiratory infection is a viral infection that passes from one person to another, irritating the nose, throat, and lungs. It often comes with congestion and a nagging cough. The phlegm ...

Mucus is a substance that lines the moist surfaces of your body, like your lungs and sinuses, and helps your body fight illness. Experts say it’s better to spit out excess mucus when you’re ...

When a cough is productive, it means that a noticeable amount of phlegm is expelled. This enables the lungs to get rid of harmful substances. A productive asthmatic cough will expel phlegm and ...

The lung disease sometimes causes coughs that produce mucus (sometimes blood), fever ... develop a bluish color in your lips and fingertips, have chest pain, a high fever, or a cough with mucus ...

However, did you know that mucus production actually helps the lungs by trapping irritants such as dirt and dust, and infectious particles such as bacteria or viruses? These are then passed out of ...