Discover magazine....
I remember reading about some type of experimental treatment in discover magazine a couple of yrs ago..... Might be worth searching the website over there.
Anyhow-Someone came up with a special wand that a doctor simply passes over your scalp as soon as you feel the migrane start.... Supposedly, this "aura" you describe can precede the actual migrane by some amount of time in some people.
The neat thing about the device is that it emits a pretty strong magnetic field. The theory of why it works for some people is pretty interesting:
Apparently the "aura" is actually a very specific set of bneurologocal interactions happening in the brain which sort of "constructs" the very specific set of conditions needed for the migrane to happen. This device interrupts the electrical impulses needed for the mnigrane to take place.
According to the article, the set or "cascade" of interactions varies greatly from person to person, but apparently, the hope for this device is based on the fact that it seems to reliably interrupt this cascade of interactions. According to what they seem to know about migranes, if you can hit the "aura" part of the event enough times, the brain cannot produce migranes anymore because the "cascade" or chain reaction which occurs during the aura stops happening. Essentially, this device makes the brain forget how to construct a migrane.
-Painless, no drugs.
-Sorry I can't remember exactly what this thing is called, but it has to do with electromagnetic stimulation, and it looks an awful lot like a metal wand they use at a security checkpoint.