I had sciatica through my left buttock, and down my left thight that was agony. I tried to get it fixed by a chiropractor, who advised several yoga exercises as well as administering his own theatre of pain to me. To be fair it would work for a couple of days an then come back with a vengeance.
The only thing that worked for me was to return to normal exercise, even though it hurt to start. I cured myself through football in the end, which I'm, not sure is great advice but ultimately worked for me!