Underlying conditions relating to “TMJ” like symptoms are often systemic, emotional, and structural leading to physiologic imbalance. If we were to compare headaches to an overflowing dam, the reservoir is filled with run-off from rain, hail, sleet, and snow. When too many of these factors are present, there is an overflow resulting in a flood below the dam. Similarly, postural, emotional, systemic, and structural contributing factors may overflow the threshold to culminate symptoms in the head, neck and jaw.  Link to web page on Biofunctional Dentistry.