Simply put, Temporomandibular Joint Disorder (TMD — also abbreviated as TMJ), is when your jaw joints are out of alignment, and many uncomfortable or painful symptoms begin to appear.
A severe and recurrent headache is one of the most common symptoms of Temporomandibular Joint Disorder. Many TMD sufferers consider them the most painful and debilitating of the symptoms, and some describe them as "migraines".
You might have been living with some of these TMJ symptoms for years, because many people who suffer from TMJ do not realize it. They notice the chronic headaches, the sleep difficulty, and the ringing in their ears, for example, but do not realize that these disparate symptoms all stem from the same dental condition.