For a long time now I have been trying to put a name to my symptoms and I am wondering if the symptoms I have are indeed Piriformis syndrome? I do sit a lot at a computer and realise now that has been my downfall. I am retired and it is not essential that I sit for long periods but I do. I have a burning sensation (excrutiating actually) down the back of my leg and the burning continues to below the knee and burns down my shin bone. This is my right leg and now I have started with a burning sensations at the back of my left leg. I have tried injections, chiropractor, massage, electrode treatment, exercises. Nothing has worked. But if I could put a name to this it would be a start. Thank you.