This cold and flu season, you may be looking for clues you're getting better anywhere you can find them, even in the color of your snot.

When a white blood cell finds a germ, it latches onto it. Then it changes its shape to surround the germ. You can imagine the ...

Mucus is a healthy protective lining and ... The symptoms can include coughing up thick yellow, green, or brown phlegm. Seek ...

thick yellow/green mucus, and possibly bad breath, according to Dr. Ren. To get immediate relief for a runny nose, Dr. Ren suggests first blowing your nose gently to clear excess mucus.