My holistic dentist told me I have TMJ. I don't have any pain or headaches, just the popping noise on the left side of my jaw when I open my mouth wide. He says it's from Amalgam fillings, and I think I believe him, because it didn't take much to dislocate it - I was eating candy 13 years ago when my jaw slid to the side, and hasn't been the same since. I haven't yet replaced all the amalgams. But I've been taking supplements, like iodine, to rid the body of mercury. Perhaps it works because for a few hours after taking iodine, the popping stops. I can open my jaw wide and nothing happens. But it always comes back. Lately, though, as I've been better about taking the Iodine consistently, the popping comes back, just not as bad. It seems to be diminishing! Maybe someday after I'm amalgam-free, and iodine-soaked, it will all go away completely.