I have noticed myself grinding my teeth lately. I think I must do it at night too , because my jaw hurts . My wife went to the dentist today, he said she has been doing it too. I guess he noticed it by looking at her teeth , because she didn't say anything about it until he said something. He touched a muscle near the back of her mouth and she said it brought tears to her eyes. Must have been sore from the grinding. He said she could buy a mouthpiece for $360.00, I told her just to get a football mouthpiece for $2.00. Anyone have this problem? What did you do to fix it?