Why Does My Jaw Click and Pop? The Science of TMJ and How to Treat It in Sunnyvale, CA It happens when you take a bite of a sandwich, yawn, or simply talk: a distinct, sometimes loud click, pop, or snap in your jaw joint. For many people in Silicon Valley, a clicking jaw is a minor annoyance. For others, it is accompanied by dull headaches, facial soreness, or a jaw that occasionally feels "stuck ...