Teeth grinding

I have schizo effective bipolar sense I went into a manic phase I grind my teeth a lot. Why is that and does anyone else have that problem

[Xila31]

I don't grind my teeth, but I clench my jaw. I clench it so tight it actually becomes painful to my muscles and even my teeth hurt, and I get to a point where I can't even stop myself. I get headaches from doing it. I don't know if it is due to my bipolar or my anxiety but I've done it for as long as I can remember.

[rBoulet]

I grind my teeth almost constantly when I'm in a higher mood. I think it might be just a way to get some of that pent up energy out without jumping up on a table and dancing.
That might be just me though.
My mom does it too, and she also has bipolar. She got to the point where she needed to wear something to protect her teeth.

[moonpanda]

Yep, I grind and clench away through both night and day, but not when I'm feeling good (i.e. stable). Mania, depression, they both entail an enormous amount of anxiety for me, and now I have TMJ and headaches, all thanks to the clenching and grinding. So I suppose my clenching comes from anxiety, and sometimes from misplaced energy while manic. Either way, ouch.

[Csandnugget]

Yes, teeth grinding, jaw clenching, TMJ operation, bite plate recommended that I wear it all the time.
This was one of the many symptoms of anxiety that I was going through, I was constantly at the GP, feeling ill.
It was bipolar all along.
It's nice now that I know what is wrong, I can work on it properly now