Hi. Just remember, the thyroid has something to do w every action of the body. What has your dr said about testing,eyes,spine,sinuses,TMJ and yes thyroid. Do you have any other symptoms? As far as learning more about Hyper/Hypo-T a good book to start with would be The Thyroid Solution by Arem. There like 6 headache references listed.
I have a theory. That always means there's no basis in fact, but I believe it to be true. When I was really messed up, my muscles were so tight, especially my neck and shoulders. This constricts blood flow to your brain and we need all the blood flow we can get. Everyone go to a masseuse, I'll buy. http://www.healthboards.com/ubb/rolleyes.gif IWL