Does Anybody Know What This Is?

This happened in about December of last year.  My veins on my right calf turned dark red then the skin peeled over them, then eventually they turned kind of like a dark bruise color but they aren't as noticeable as they were.

These pictures are of the same leg but right below the knee, these are new.  I'm kind of worried about them because its the second time this has happened.  I don't know what this is, if someone could tell me and what I might do to get rid of it I would appreciate it.

Willow