We know migraine involves headache, somewhat very severe we hardly can bear. And if you ask me how it occurs, I will simply and briefly say that it's due to the vasodilation of the blood vessels at the brain..
Besides taking pain killer, I would suggest you to take some sips of coffee so as to initiate vasoconstriction of the blood vessels, hence lessen the severity.. It works on me. Well.. First, I have migraine, since I was 9.. Secondly, I'm a coffee lover^^
Withal, I hope this video will really help us all to understand about it:)