Look for a pain management physician. I saw one in North Attleboro and he was fantastic. I've also tried the craniofacial clinics around Boston, but none were that great tbh. The folks at Tufts just told me I was stressed and needed therapy to stop clenching my jaw- even though there is a clear deformity in my bone shape on x-rays...

Someone mentioned Botox below, and it definitely works wonders- but my insurance doesn't cover it (and I have really, really good coverage). You can also try a stem cell treatment as well, which also helped me for several months until it wore off (some patients get relief for 2+years from it though).