This doesn't have so much to do with my back, but there is a spot of skin a few inches to the left of my spine that was about the size of a quarter 2 years ago that would "act up" when my body was tired or stressed. It would get tingly when I'd sit up on a stool for too long or just sitting uncomfortably. When I would touch it, it didn't have much feeling. My friends told me it might be pinched nerves. In the past few months i've noticed that the spot has gotten larger...it's not visible its between the bone and the top of the skin. It's not so much tingly now as it feels more like a large mosquito bite. I hope its nothing serious. I can't go to the doctor because I don't have health insurance until the end of August.