I know this is an old thread but I just wanted to add my 2 cents. About 8 months ago I noticed with "excitement" I started having these EXTREME migraines, im talking to the point I had to lay down with my hands over my eyes. After going to the doctor and having an MRI he found a small section on my left frontal lobe, Supposedly Iron deposits ? But it can cause extreme migraines and I will be getting it removed with a laser in about 2 months. Any strain works to help it, especially Sativas because indicas put me on my ass and I cannot function during the day on an Indica. I do however smoke a heavy indica before bed because it knocks me out. Hope this helps!