In temporal arteritis, is the jaw sore to the touch, or only when chewing? I have both and I have had this on and off for many years, should I worry

Less likely. Usually the symptoms would not be so intermittent with temporal arteritis, so less likely . Probably have this evaluated further .
TMJ. If there is temporal arteritis you get severe pain and tenderness over the TEMPLE. You will notice visual symptoms in time. Pain on chewing suggests a look at the TM joint.