I have red spots all over my legs that appear one night out of nowhere and now for a week some spots have disappeared but every morning more spots appear, even in the same place that spots had disappeared. The older spots have faded to dark/brown color. There some small ones that are also appearing in my arms as well. The older ones are flat, but news are coming out a little bit. They do not itch. They are spreading even rapidly everyday instead of disappearing. What do you think it is? Thank you!