Used to have TMJ symptoms fairly regulary. I had a dentist trained in accupressure press on stomach on my left side just below my ribs, haven't experienced TMJ symptoms since then. This was a few years ago. I would definitely recommend acupressure.
Several years ago the right side of my jaw would swell and my jaw would lock. This condition would be aggravated by my salivary gland when I "thought" of eating a cookie. Strange indeed. I went to the dentist and he sent me to an Orthodontist that pryed my mouth open. That helped at the time but it wasn't until a co-worker suggested I see a Chiropractor that I was cured. I couldn't open my mouth but he managed to put a finger inside my mouth on the "left" side and applied pressure to a muscle. That afternoon the swelling was gone. I have used this technique myself over the years to cure myself and it's always worked.