In the last few weeks I have started to suffer episodes of scintillating scotoma. The first was alarming, but since Googling it, I just ride it out for 20 minutes or so. I have never suffered from migraine, so consider myself lucky to only get the visual disturbances. They seem to happen when I arrive home after an exercise class, so don't know whether it is the drive or exertion which is the trigger. Anyone who has full blown painfull migraines has my sympathy, ex DH had to spend days in a darkened room.