I am 21 and perfectly healthy but I have dark blotches on the back of my calves and only on the back of my calves.They do not itch and are not sporadic. They seem to be connected like a web. I have had the botchiness for a couple weeks and just attributed it to being outside coaching softball in the sun. One of my friends was walking behind me and noticed them and I looked down and they appeared to have gotten larger and more red. The next day they went back down to regular size and color. Can you help?