Your dentist can diagnose the problem by feeling muscle tension in the jaw and face… observing if teeth are worn or cracked… and viewing X-rays. Treatments include reshaping and polishing of tooth enamel to improve tooth alignment and/or the use of a mouth guard during periods of excessive grinding.
To ease jaw pain: Place your palm or fist under your chin and push up while barely opening your jaw against resistance. Hold for one to two seconds. Repeat 30 times, twice a day. This will stretch and strengthen jaw muscles, which helps alleviate pain.