Does anyone else have the BURNING sensation in their muscles after sleeping or sitting for a long period of time? I am forced to lay mostly flat on my back since I broke my back last year, and I wake up feeling like I have acid running through those muscles in my buttocks. It lasts most of the day. Then when it just starts to subside, it's time to go to bed again. I turn from side to side to relieve the pressure, but then my sacrum where I had fractures hurts. Ug. No rest for the weary.