Ok. I had a fairly bad headach today, but I found out how to relieve it. All you do is relax, close your eyes and incision your brain. Now invision that the part that is hurting you is red/cracked like with lava or something. Now breathe in and immagine you are drawing in light. Now exhale and invision that it is q wave of light passing over and healing your brain.
It worked for me, so I hope you will find it useful as well. It is best for when it is really bad and you just want it to go away for a few secconds. It will probably come back after a few mins, but it won't be quite as bad.