I use a rolling pin and start right at the top of the hip and roll it down to the knee. Really, really, really hurts (using a rolling pin probably add to it) but it's really sorted me out on the 2/3 occassions I've had it. I only needed a few days rest before resuming again.
Have never tried this but could be good advise i used a physio who had the same effect with his hands,no pain no gain.