Hypnotherapy is not a guaranteed cure for migraine, but its deeper reaches can greatly mitigate the pain and help bring about longer-lasting relief. This method taps into the subconscious, the part of the mind where memories and emotions are stored. Incidentally, hypnotherapy is also an effective treatment for phobias, trauma, and other emotional scar. This does not necessarily mean that migraines stem from some form of emotional affliction. What is known, however, is that stress is subconscious by nature and can result in physical afflictions like migraines.
http://www.balanceforlife.biz/mystery-vs-mystery-hypnosis-michigan-fighting-sporadic-headaches/