Sciatic problems have plagued me for many years, trips to my local chiropractor have got me back to pain free running but the problem never went away, ready to strike back at any time!
a couple of weeks ago the sciatic pains down my leg came back with avengence, even walking was painful! I decided to try some stretches The One Mile Runner recommended, straight away i got relief and was able to run a 14 miler without much problem.
It seems many runners get sciatic problems so here to help you are some video's.
The next video shows the doorway stretch that helped me,
Stand on one leg, lean forward then drop opposing hip down.
And here is one final stretch to try, hope they help.