What is this??

Amanda
Anyone have any insight as to what this might be?? This is the best picture I could get with my crappy camera but it's a little redder than it looks in this photo.
Heres a little background: It's a spot on the front side of my thigh, a little larger than a quarter. It's hard to the touch.
About a week ago I noticed that the skin on the front side of my right thigh was sensitive to the touch. It was also cold and heat sensitive. I figured it was just a weird random thing happening to my body and let it go for a few days.. Well now this spot showed up in the same area, and while the skin sensitivity is better, the spot itself is painful to the touch and I've been getting random "jolts" of nerve pain in that thigh.. 
Anyone have any ideas? Should I see a doctor or just wait it out?