Phlegm is naturally clear. So, if your phlegm is a different color, such as yellow or green, you may have a viral or bacterial infection. Brown, red, or black phlegm may be a sign of a more serious ...

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 ...

Certain remedies, such as staying hydrated, using a humidifier, and taking over-the-counter decongestants, can all help ease excess phlegm in your throat or chest. Mucus is sticky, so it can trap dust ...