I have been on Topamax, well, the generic brand Topiramate 100mg daily for about 4 and a half weeks now for migraines. I have gone through some of the usual side effects: loss of appetite, tingling hands/feet, confusion, and they are beginning to subside for the most part. However, I have noticed that I am starting to itch on my back and on my upper neck around my hairline, especially when I start to work out or increase my movement. I don't believe it is an allergic reaction, since there are no other signs, and I have been on it for over a month now. I have not changed any of my skin care products, or my laundry detergent and I was just wondering if it could be due to Topamax? Has anyone else experienced this with Topamax?