Re: TMJ......Hello. I am new here, but suffered for years with TMJ. My dad ground his teeth badly, so I truly believe there can be genetic/ anatomic reasons. But I also believe stress, as others noted, is often related. A good dentist or osteopathic physician who understands muscles of the mouth may help. It is what helped me, along with meditative tapes at bedtime. I also found inexpensive sports night guards sold at drugstores were as good as expensive custom made ones. I "ate" through many, but manipulation of my jaw helped. Hope these suggestions help. Take care....New Member