Some people think the definition of migraine is "very painful headache". This is wrong. Migraine is a class of very specific neurological events, usually involv

Some people think the definition of migraine is "very painful headache". This is wrong. Migraine is a class of very specific neurological events, usually involving one side of the head (hence the name migraine, which comes from the Greek hemikrania). There are many potential symptoms, one of which is pain.