ii had sciatica for about 9 months a few years ago, OK when I was working but absolutely crippling at night, tried everything even bloody yoga but it just would not go, then one day I was working on a site speaking to a sparky who told me his wife had suffered from it, he told me she put two big pillows under the knee of the leg the sciatica was running down and she had never suffered from it since, so for the price of two pillows I thought is would give it a go, after about two full weeks it started feeling less painful and was completely gone after 4 to 5 weeks and it has never returned, might not work for everyone but worth a try