Hi Jennie, I had a sciatic nerve problem that was in the buttocks area and went down one of my legs. It was not the result of a disk pinching it because it didn't show up on any x-ray, but it may have been caused by the inflammation from my hip bursitis. Sitting on certain chairs made it hurt really bad. I was already on an anti-inflammatory, and my doctor said I could have physical therapy if I wanted. I didn't because I'd had enough of that for the bursitis. Long story. Anyway, I did series of stretches that I found online specifically for sciatic problems and after several days of these stretches, hot and cold pads and the anti-inflammatory, it went away.
Check this website for more information: http://www.mayoclinic.org/diseases-conditions/sciatica/basics/definition/con-20026478