Jaw Flexor Stretch: Gently open your mouth wide and then close ... especially for those with existing health concerns. Incorporating the best exercises for a stronger jawline into your daily routine ...

If you wake up with a headache, sore jaw muscles or achy teeth, you might be grinding your teeth at night or clenching your jaw. The condition — bruxism — is surprisingly common, experts say.

So, 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, "and then you can go back on with ...