For Cherise Irons, chocolate, red wine, and aged cheeses are dangerous. So are certain sounds, perfumes and other strong scents, cold weather, and thunderstorms. Stress and lack of sleep, too. She suspects all of these things can trigger her migraine attacks, which manifest in a variety of ways: pounding pain in the back of her head, exquisite sensitivity to the slightest sound, even blackouts and partial paralysis. Irons, 48, of Coral Springs, Florida, once worked as a school assistant principal.