I have that problem also and I just got a new chair a few wks ao and it's helped some. I also got that table Joanne's had on sale and it's a good hgt so you don't have to bend your back. I think it's also the desk I'm using but I'll have to keep getting up. Their are certain chairs that will make the sciatic nerve hurt and I can't sit but a couple of min. I guess I need a pillow to sit on. Good luck wish I could help you more but I haven't figured out the problem yet myself. Sue