I started researching this issue, as I too experience the pain basically while golfing and driving my car. When I golf I feel it in my left leg and left side of my butt. The pain is not so bad that I can't golf, but you can feel it throbbing. When I drive my car which I feel has very poor support in the seats, I feel the pain in my right leg and right buttock. It kicks in any point after about 10 or 15 minutes of driving and I have to shift my weight to my left side to relieve the throbbing. I don't keep my wallet in my back pocket anymore, but still have this pain.
Hopefully it stays at this stage and does not get any worse, but I will start doing regular exercises to try and minimize the throb.
