Super quick response here, a good Massage Therapist with experience and an interest in Trigger Point therapy would be a good start.
Full disclosure (and a shameless plug): I am a good Massage Therapist with experience and an interest in Trigger Point therapy. Watching someone get off the table and realize their crippling headache is gone is one of the most professionally rewarding experiences.
If you're interested, I could put together some resources and self-help.
Folks in the Boston area, feel free to contact me.
Have a good night.