I'm going through it just like that but it has a good bit of the sides of my torso covered and a bit on my arms. My legs were bad but have majorly cleared up. I'm on the last of the prescriptions I have from living up north, which I use on the worst spots, and the rest gets Gold Bond... which has been doing well.
This flare-up is the worst manageable, fastest spread, and most painful I have ever had.