Even though it's the biggest part, it's actually the third phase of a migraine attack. Watch this video to find out what happens during a migraine headache.
Transcript: The main event of a migraine—the headache—is the THIRD phase of an attack. Migraine headaches most commonly involve an INTENSE, pulsating PAIN on one side of the head. Sometimes, vomiting, nausea and other symptoms accompany the pain. Often, even slight movements make the pain WORSE, which is why many people with migraines go to bed for the entirety of their headache, which can last for a few HOURS or for a few DAYS. And that room will probably be dark, too, since sensitivity to light is another common symptom of a migraine headache. More »