There are several potential reasons why you may be experiencing jaw muscle pain:
Bruxism: Bruxism is a condition in which you grind or clench your teeth, often during sleep. This can put significant strain on your jaw muscles, leading to pain and discomfort.
TMJ Disorder: The temporomandibular joint (TMJ) connects the jawbone to the skull. TMJ disorders can cause pain in the jaw muscles, as well as in the joint itself. This can be caused by injury, arthritis, or other factors.