Medically reviewed by Susan Russell, MD Coughing up white mucus can mean you have congestion with a respiratory infection ...

the phlegm can become thickened and change color.” Dr. Teitelbaum said yellow or green mucus is considered to be a “soft sign ...

Sometimes nasal discharge can be a sign of a sinus infection caused by bacteria. While the color of the mucus does not distinguish between a viral or a bacterial infection, several other signs ...