If you&;ve got headaches or neck pain that won&;t seem to go away even with treatment? Did you know your jaw could be the cause?.Temporalis.The Temporalis is second muscle of mastication – or chewing. This muscle is responsible for closing the jaw so to help it release it we&;re going to slowly open. Simple as pie. Try it yourself on both sides. To start:.Clench your teeth with your hands on the side of your head you&;ll feel the muscle pop outGently perform some circular massagePin under your hand and stretch by opening your mouth slowly(not to max) Hold at end of opening for a brief pauseRinse and repeat 8-10x. series