Google this for a good read. It is a form of treatment simular to acupuncture but the needles are put into the muscles to help relax them.
I have been suffering from constant severe temporal headaches on/off since 2000. This is currently my second bad bout of the headaches. I have been in bed pretty much since oct in terrible pain. I have tried several forms of treatment. After trying IMS three times since last Friday we have had some results in the pain..
Please read this site, it might be something that could help your headaches. iSTOP IMS.
Just not sure if it is available iin the states. I am in Ontario and it is offered at a Physiotherapy clinic. The therapist does some acupuncture along with the IMS.
Let me know what you think.