If you wake up with a headache, sore jaw muscles or achy teeth, you might be grinding your teeth at night or clenching your ...

James Wan, the director of the original Saw movie, revealed to People his favorite torture trap from the gruesome series. "It's really the jaw trap," Wan said of his favorite torture device.

These devices don't necessarily ... if you catch yourself clenching your jaw during the day, "the first step is to realize that you are clenching," he says. Try this exercise to break the loop ...