Question: what does it mean when you wake up with white stuff on your lips?
Answer: It's caused by post nasal drip gathering up to form a biofilm, a thin layer of bacteria that covers your teeth and gums as well. Dehydration also contributes to this. When we're awake, we lick our lips and it keeps the sticky stuff off for the most part. These are just a few things that happen to us while we sleep.