happens while you sleep than with what happens during the day.
HealthConditions
Why Does Dry Mouth Happen at Night?
Saliva production naturally decreases while you sleep, so some mild dryness in the morning can be normal. However, several factors can make it much more noticeable.
Breathing Through Your Mouth
Sleeping with your mouth open allows air to pass continuously over the tissues inside your mouth, causing moisture to evaporate. People who regularly breathe through their mouths may therefore wake up with a particularly dry tongue and throat.
Nasal Congestion
A
