I get pretty unbearable pain in upper and lower front teeth after moderate exercising. Walking on treadmill or outside or snowshoeing. In any kind of weather. I have had x-Rays taken at dentist to rule out any unseen infection. I have had recent blood work done. Everything is perfect. I am not on any prescription medication. I am 69, female and weigh 140 lb. I do not clench my teeth as I walk with a friend and talk the whole time.