I am suspected to have fibro myself. It is either that or one form or another of arthritis. I have yet to be able to see a rheumy so it is an assumption based upon having all the tender spots, severe fatigue and full body pain. But since I am also a spiney top and bottom it correlates with those injuries as well. I am male so that puts me in the lower percentile, but my RF factor was abnornaml high, and my mother also has Fibro.......The particular dermatome you are experiencing pain from should originate from the outer part of the hip ans sweep across and downward of the thigh into the inside knee. If that is the path felt then it is resultant from L3-4.