For the last month or so, there's been a spot on my lower leg, about the size of a hand, that feels as if it's heating up. It's on the outside of my left leg, just above my ankle. It usually warms up for a few seconds, then goes away, but it's been getting more frequent. The skin isn't actually getting any warmer, so I'm assuming that it's nerve-related and nothing to do with the blood vessels. It really doesn't seem like a big problem, just kind of odd. I have had a slight problem with my lower back. I have to pop it regularly because it feels like it's stuck or something and becomes uncomfortable. I have no idea if that's related, but considering the situation, I figured it might be useful information. Any information or ideas would be greatly appreciated!