Jassey, DOCoughing up thick, green mucus may mean a bacterial or, less often, viral infection, but that's not always true.

To many people, mucus is nothing more than a gross goo, something to be tossed away in a tissue immediately after clearing your throat or blowing your nose. To scientists, it’s nothing short of a ...

Before you or your pediatrician can decide on a treatment plan, you need to know what’s causing that stuffy nose. And there are many possible causes. The color of mucus doesn't reveal whether it ...