My 14 month old woke up with what looked like huge welts on her legs. They started around her knees and went up to towards her butt. I gave her bath and they seemed to get better but they continued to spread. She did have a low fever of a 101 that lasted two days. They don't seem to bother her. I thought that maybe it might be Roseola, but the rashes are usually on the neck and chest and she doesn't have any there. Could it be anthing else?