The other thing that can help, especially if you are feeling real cramps in the jaw muscle--which I get and they are VERY painful--is to put some kind of heat pack on it. I have one of those neck wraps you can warm in the microwave and I've found it I drape it over the top of my head, the ends are right at the corner of my jaw on each side and the heat really seems to help ease the cramps--and a phsycial therapist told me that actually part of the muscles that control the jaw extend up to higher on your head anyway so I think I may be relaxing those muscles too when I use that wrap that way.

Nelie