Q. Hi, I have recently been advised that I am suffering from headaches, and facial pain as a result of grinding my teeth at night, and clenching my jaw when anxious. My dentist advised me that I should purchase a special guard to protect my teeth-but that it would cost me £198. I am a Full time student and cannot afford to buy this at that price. I have been told that if you go via your Dr you can sometimes get this for free, is this true, or is there a cheaper alternative? Please help!