Migraines are not just bad headaches. They are episodes of throbbing, pounding pain often accompanied by nausea, dizziness, fatigue and hypersensitivity to light and sound. The ache is usually so intense that all you want to do is lie in a dark room and sleep. An estimated 32 million Americans suffer from migraines, whether it’s once or twice a month, once a week or nearly every other day. Doctors don’t fully understand what sets off a migraine, but they do know that it’s linked to overstimulation of the trigeminal nerve (the nerve responsible for facial sensation), dilation of blood vessels and changes in levels of the neurotransmitters serotonin and calcitonin gene-related peptide. Though migraine sufferers have different triggers, and no one drug is effective for all, there are certain guidelines you can follow, based on the frequency and severity of your attacks. We’ve divided the recommendations into three categories: people who get migraines once or twice a month, those who get four to 10 migraines monthly and those who suffer from chronic attacks (more than 14 a month).