Answers:
Stale saliva and limp cell contained by the mouth,mixed beside plaque it make a repulsive concoction
You are forgetting to swallow the aspirin you are taking past going to bed.
Have you only just started to smoke and drink on regular foundation (either or can be the cause), if so specifically what cause it. Get used to it if this is the answer as it never go away, you only catch stronger and stronger toothpaste and start drinking more and more black coffee first point within the morning.
sleeping near your mouth accessible, maybe
its bitter from your stomach--try some gaviscon since you shift to bed and see if it help
1. GI diseases close to tart reflux will endow with you a bitter savour surrounded by the morning.
2. Accumulation of tartar or plaque.
3. Dehydration.
Depends if you smoke or not! Or you entail to drink more dampen and brush your teeth until that time bed time lol. Drink more liquid, if you do smoke its conspicuously from the nicotine
are you taking zopiclone?
lol i muse every1 get dat 2 be honest... and i assume its from your spit not be swallowed wen u sleep or sumtin approaching dat.. oooh okay i mite be wrong but i tried lol x