I noticed I've developed these circular yet patchy pinkish red marks on the back of my calfs, close to my ankles. One leg has a fairly large red circle and 3 smaller ones around it. (The large one looks oddly like Mickey Mouse) They don't feel much different than my other skin, if I rub my finger over them without looking I can't tell they are there. They don't itch or burn, I'm just concerned because the first thing they made me think of (being that they are circles) is ring worm.