As I understand it, although the pain above the eyes and in the head is caused by vasodilation, this is just an after-effect of the migraine, as such. The actual migraine is the
constriction of blood vessels at the base/back of the brain. It is this lack of blood to the areas dealing with vision and sensation in the hands which lead to the aura and the numbness that particularly severe sufferers get.
And I talk from experience
Believe me, I understand why people having their first migraine can think they're having a stroke. Blindness, numbness, vomiting, severe pain - a wonderful combination!
Apparently, this constriction happens in pulses which can be either as rapid as one every minute or two, to long slow squeezes followed by periods of relative normalcy over hours. The cause of the pain is apparently the rush of blood to the head after the first constriction relaxes. This dilates the blood vessels and causes the, frankly, crippling pain that I any many others on this thread seems to exprience when we get hit by one!
My own, purely anecdotal, evidence supports all of the bumf above that I have gleaned from my doctor and various websites, as I definitely experience the periodic tightening and loosening at the base of the neck, accompanied by related worsening or easing of the symptoms.
I control mine through watching that I don't eat any of my triggers (cheese, large amounts of chocolate all at once and, weirdly, USA-sold orange fanta!) and by ensuring I sleep regularly and eat regularly.
For the record, IMHO, homeopathic remedies for migraines are just as effective as homeopathic remedies for anything else, which is why I don't take them
Anyway, that's the benefit of my experience and input for what it's worth. Ciaoski for nowski.
ETA : Oops! Let's not forget the low doses of beta-blockers I also take which have helped!
