I get a sensitivity to touch-pain on the top of my head,on the right side, sometimes it goes to the other side, I had singles a few months ago, it was a mild case and I was treated with Valtrex, could that have something to do with this feeling I am getting on the top of my head, it isn't a real bad pain, it is more a sensitivity to the touch on my head! you think I should worry? what do you think it can be? thank-you