Uhhmm my muscles itch?

Ok I know this is weird but after working out yesterday I noticed that the muscles down my left leg from my thigh and down itch. I know it's not my skin because I scratch but it doesn't help. But I notice that if I stretch my leg it takes it away some but I can't sit around stretching all day =[ so is there a way to get this to go away? Why are my muscles doing this?