Because the illness affects the air sacs in the lungs, it can result in a persistent cough, which can produce dark brown or ...

The symptoms can include coughing up thick yellow, green, or brown phlegm. Seek medical attention if you think you have ...

And the mucus production, timing and other subtleties of your cough can reveal what’s causing it. We talked to doctors about how to identify different types of coughs and how to treat them. Here’s how ...