Injury to the temporo-mandinbular joint can cause severe headaches. Decayed teeth could also lead to headaches. Dr. Mukul Dabholkar said, "Dental decay causes loss of ventricular relation (VR) - that is the upper jaw closes over the lower jaw. This over closure causes headache."
The temporo-mandibular joint is a unique joint which works in unison with teeth. The teeth tend to over close in a person who is suffering from temporo-mandibular syndrome. When the numerous muscles present around the jaw dislocate, it leads to anxiety and spasms. This pain persists in all the muscles of mastication.
Usually patients with such syndrome consult ENT specialists or neurologists. But consulting dentists could prove to be helpful. Even physiotherapists could help such patients.