It might be your piriformis muscle that can be affected by sciatica. Google piriformis muscle and then read about helps like stretching. I have this along with osteoarthritis in the same hip and it can really hurt especially when both problems are kicking in! It can hurt all the way down to my ankle. Only thing that helps me is stretching - and that can take maybe a few days to really get it loosened up and/or help from my chiro.