Looking at the color of the mucus you’re coughing up isn’t an effective diagnostic tool on its own. The most effective way of identifying bacterial infections is by testing a sample of the ...

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

However, some colors of discharge can indicate an infection ... or green usually signals a bacterial or sexually transmitted infection. Contact a doctor promptly if vaginal discharge is thick ...

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 ...