Bruxism: Teeth grinding (bruxism) is common. Twitching is not uncommon either. Causes vary from sleep disorders, lifestyle and psychological factors; certain digestive issues, and/or underlying anxiety which accounts for about 70% cases. A night time teeth grinding mouth guard is a worthy investment and can be found at most pharmacies or on line. Good luck.
Answered 3/24/2013
5.2k views
Stress: Possibly it's related to stress in your life. You manage it while awake, but when you sleep, your subconscious takes over and away your jaws / muscles go- grinding.. Another theory is that you might have constricted breathing airways and it's a way your body compensates to try to get more air.
Answered 7/14/2017
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