Like I said, stopping me from grinding my teeth at night. I also wear a splint so the teeth can't make contact. Causing the rest of me to relax is just an added benefit.
The issue is that if it goes untreated, it can cause damage to the muscles, pain, inability to close your mouth properly, damage to your teeth, all kinds of bad things. For me, it was ringing in my ears (the muscles run past part of your inner ear, the constant strain can mess up your hearing some) that made me go to the doctor, and eventually we figured out that this is what was causing the problem. So, a muscle relaxant most nights, and a splint I wear over my teeth.
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"You're never more alone than when you're alone in a crowd"
-Captain Sheridan, Babylon 5
Music of the Moment: Radiohead - In Rainbows