I've had migraines with aura for years and was prescribed topamax almost 10 years ago to combat vision loss attacks. It definitely has reduced the length, intensity and occurrence of my migraines. And, although I still get auras, I haven't had a complete vision loss in years. Now though, I have these phantom like migraine pains to the touch on my head.I had an aura migraine on Christmas Eve and ever since, although my sight is fine and my actual migraine is gone, if I touch the left side of my head, I feel a migraine come on instantly. But it goes away when I move my hand. Its not my imagination. This pain is the total sense of a migraine on the entire left side of my head to any touch. So, I googled it and came up with Allodynia. Anyone heard of this or suffered it? How long will this last?