As people age, the shape of their face begins to change. As fat builds up in the neck, the skin begins to sag and the jaw muscles begin to shrink. This may cause your jawline to become less defined.

That tight feeling in your jaw during intense workouts isn’t just a sign of concentration or effort, it’s actually creating a cascade of muscular tension that’s limiting your strength, endurance, and ...

Medically reviewed by Jennifer Steinhoff, MD Key Takeaways Use a warm compress to relax your jaw muscles.Chewing hard foods ...

Trismus, also known as lockjaw, is caused by trauma or injury to the mastication (chewing) muscles. You need your mastication muscles for chewing your food and opening your mouth. Without it, it would ...