Hi a couple of years ago I noticed brown saliva in the morning and a bad tase in my mouth - it seemed to appear after a bad cough and unlike the cough has never cleared up.  during the day it is normal.  I am reluctant to go to the dentist as frankly I cant afford to but teeth seem in good condition and the problem dosnt seem to change if I brush at night or not or if I use listerine.  Any help would be appreciated. Peter
You might want to get your sputum examined. If you have also experienced Weight loss and night chills it could be a lung infection.