Dry mouth, or xerostomia, ... found that 45% of the participants woke up with a dry mouth. If you have moderate to severe sleep apnea you’re more likely to wake up with a dry mouth.

4. More Tooth Decay and Gum Disease This is likely one of the most severe effects of chronic dry mouth. Saliva is your mouth's built-in protection against cavities. It cancels out the acid that is ...