My 7 yr old daughter suddenly got a rash like this last night. She woke up with it on the front and backs of her upper legs, knees, elbows, feet, wrists and hands. We went to the doctor but they had no idea. They prescribed a steroid-type cream which just stung and shortly after applying it they started getting the blister-like heads and busting and they really are hurting her. I live in southern Indiana and I've been searching the net tonight trying to find a matching pic and yours looks just like it. My daughters are in HUGE clusters though. We are trying the Caladryl clear now because the Dr. said to stop using the steroid cream on the open places. We are going back tomorrow for a follow-up visit. I'll let everyone know.