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

Discover the similarities between Covid, flu, and the common cold, and learn how to diagnose each one accurately with testing ...

The common cold is a viral infection which affects the upper respiratory tract (the nose ... “When you have mucus in your ...

A higher-than-normal amount of phlegm can build up in your nose ... starts to produce too much of it due to an infection. Your airway glands create thicker and stickier mucus to help fight ...