I've been lucky not to have been cursed with them, but my wife had them daily for years (same synptoms as your son) She tried a lot of different meds, none of which helped. She learned of a new procedure that entails a "brow lift". A plastic surgeon implants, for lack of a better word, threads that pull the skin of the forehead up into the hairline. It's been two years and she's only had one or two migraines since. It was expensive and not covered by insurance (then). As the procedure becomes more commonplace maybe insurance will cover it. Good luck with your son, my wife's were certainly debilitating.