The human skull has many components. In fact, in an average adult human, the skull combines 22 bones. One of these bones is the mandible, more commonly known as the lower jaw. Recognized as one ...

A person may clench their jaw or grind their teeth without noticing it ... TMJ disorders affect the joint that connects the skull and the lower jaw, as well as the surrounding muscles.

These affect the muscles responsible for chewing and the joints that connect the lower jaw to the skull. How long teeth grinding headaches last depends on the type of headache you have.