... Hi, the only true way of finding out what the prob is to go to a doctor. Phlegm that is yellow, brown or green most often indicates an infection (which can be treated with antibiotics. White phlegm though I'm not sure about. I have white phlegm right now and feel like I have a lung infection with sinusitis so, the white stuff could just be from nasal drip into the airways at... (3 replies)

... the green phelgm. I never knew last year whether my MAC went into remission or not. The doctors did a CT scan in Dec. ... (237 replies)