I've had at least some sciatica for about 24 years now. I was 42, and simply picked up an almost empty bag of cat litter (Maybe 1 pound left in it) and wow, was it bad. I missed almost 3 weeks of work from that first bout with it. It cleared up almost as suddenly as it started, I was hurting bad, and I had to deskunk one of my dogs, and bending over him in the tub made 90% of the pain disappear by the time I was done. By that night, it was totally gone. I would have spells of it about every 3-4 months, usually lasting 4-5 days. None was as bad as that first one.
This 3-4 months between spells coninued until 2007, when I severely injured myself in a stumble and fall. Since then, the intensity has diminished a lot, I don't have it bad enough to miss work or not do something I really want to do. But its almost always there a little if I'm standing up. If I stand still, it slowly intensifies to the point it's really unpleasant and at the same time, my right knee goes partially numb. My back is severely messed up, bad discs, arthritis, and other things are all happening at once. Tens devices sort of worked, but I would rather have the minor pain than the feeling it gave me. Salonpas and other "hot" stuff does nothing, rest seems to be the only thing that helps. I have had a couple of surgeons look at my back and both said, "Wow, you're really messed up!", both didn't recommend surgery, which was a shock. So far pain shots are a bust, they didn't work for my mom, either. PT was a disaster, as usual with my PT experiences. I'm only pain free sitting down. Lying flat on a bed is pretty bad, laying flat on an X-Ray table is almost as bad as it gets.
I see Oxycontin in my future.