Problems in the lungs can cause phlegm to change color. Green or yellow phlegm can occur with an infection, but brown phlegm might indicate bleeding in the lungs. Phlegm is a type of mucus that comes ...

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 ...