Whenever I see silver specs (shooting stars or lights), it means I'm going to get a migraine. Some people see aurasor light before the headache or migraine starts. Usually I take exedrin or some other caffeinated head ache medicine right away after auras or silver specs. I've been getting those silver lights for years. Occasionally, I wont't get the migraine, but I usually try and take something. Catching a migraine before it starts is WAY BETTER than waiting.
