Brown phlegm is less common. Here are some reasons why you might get it. If you have it, you’ll first notice a cough. It could be dry or bring up phlegm. The mucus can range from clear to cloudy ...

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 ...