I have the teeth grinding. I guess its called tinnitus? I have grinded away a lot of my teeth. So I have been wearing mouthguards at night for several years. I go through them every 6 months or more. Expensive too. I did not listen to loud music regularly and the grinding has been going on for more than a decade. It was worse last night, since my lower teeth were sore, and this was after 700 mg of magnesium citrate and a epsom salt bath. I do have fillings but I don't believe they have mercury in them.