DH suffers constantly with ordinary headaches and severe migraine. He tries to eradicate things which cause them and is finding sadly that he is barely able to tolerate alcohol at all but all the usual triggers apply to him - chees, organs, tiredness, stress. As other here have said make sure you are hydrated, eating well and not to excess, getting enough rest. Yoga is supposed to be very beneficial and there are many reports of other alternative therapies being helpful. Its a good idea to get your specs/eyes checked too.