After a several days' bout with painful sciatica, including visits to both an MD and a chiropractor without much relief, I tried the Earth Clinic suggestion of eating crystalized ginger. Frankly, I didn't think it would work for me, but I bought a bag of the candied ginger at a local health food store.
I was pleasantly surprised and grateful. Within an hour or two, there was a major, noticeable improvement. It's the next day now, and I still have some minor pain, but it's much, much less than yesterday. I can walk almost normally this morning.
I'll look for some non-sugary ginger, though, as I'm pre-diabetic and any excess sugar should be avoided. However, I'm really appreciative of the Earth Clinic suggestions for sciatica, as well as for the entire site. Very interesting and helpful!