Hi, Two days ago, I noticed three red circular spots on my two year olds lower back, where the top of his diaper is. They are uniform in size (about pea size) and spaced evenly along his spine. He has not fallen to my knowledge. It doesn't appear to bother him when I touch the red areas. There are not any new spots, but these are not going away either. He did have his first chickenpox vaccine about five weeks ago, just as a FYI. Otherwise, he is healthy and has not been sick. Any suggestions of what this might be?