I don't know what mine was, but I used to get a numb feeling on the front of my calf of my right leg (numbness, tingling, heat) it's all a nerve ending issue. I used to blame my socks - like maybe they were too tight or something. I don't get that anymore, never found out what it was, for about a year I'd get a hot spot on my calf, almost as if someone took a cigarette and was burning me with it! That stopped too. Our body has SO many nerve endings in it some are going to get a little "off" once in a while.
(and my daughter keeps getting a hot foot! It's in an ankle she sprained badly years ago)