its the joint up near your ear, like the hinge for your jaw!! where the pain is!

here trying to explain it as simply as possible!!

Your temporomandibular joint (also referred to as your TMJ) is the joint just in front of each ear, where your jaw bone connects to your skull. Problems with the TMJ and the muscles that control jaw movement are known as temporomandibular disorders or TMJ disorders.
give it time to rest!