Tension headaches are most common, accounting for 80% or more of headaches. They range in severity from minor to moderate, though in rare instances they can be severe. They tend to be diffuse, and are often described as feeling like a tight compression on either side of the head, and pressure across the forehead.
They are related to TMJ because when the jaw muscles work inefficiently or are in a constant state of stress, they can put pressure on your head (the temporal muscle, one of your muscles of mastication, is anchored just behind your eye), or they can pass their stress on to other muscles, which then put tension on your head.
Migraines and TMJ
Migraines come in many different forms, most of which are characterized by pain in the face or neck, throbbing in one area, sensitivity to light and sound, nausea, or distorted vision.
One of the most common trigger points for migraines is the trigeminal nerve and its branches. The trigeminal nerve runs right by the temporomandibular joint and its branches are interlaced with the muscles of mastication. Adverse jaw stress can put pressure on the trigeminal nerve or its branches, triggering migraines.
TMJ treatment is often successful at dramatically reducing migraines, but usually won’t eliminate them completely.