I don't know if this will help or not, but is does work for me Most of the time. Since most of our H/A's come from stress, we need to learn how to relax.

I have been able to lay down and begin to concentrate on my feet until I feel them relax and the move up to my calfs and so on. My H/A is usually gone beofre I get to my torso.

Just concentrating on relaxing the various muscles works for me. Maybe this will help you too