The temporomandibular joint (TMJ) is the hinge-like bone that connects your jaw and your skull. You can feel it moving by pressing your index fingers to your cheeks and opening and closing your mouth.

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 ...

Lockjaw (trismus) is a painful condition that limits your ability to open your mouth all the way. It occurs when the muscles you use to chew spasm, meaning they can’t relax completely. The term ...