I have that problem, Bob, both clicking and jaw pain. At night, you can feel it sometimes, and it gets worse if you tend to clench and grind your teeth at night, which I have done all my life. Many years ago the dentist made me up a night guard--a little plastic protective bite guard that fits over my upper teeth, which I wear to sleep. It protects your teeth and you temporomandibular joints. Those are the joints where your jawbones connect on both sides, just in front of your ears and which are what you hear popping and clicking. Try wearing a night guard and see if it helps! You can also buy them over the counter sometimes.