It is the story of a doctor preying on gullible folk nearly one hundred years ago by saying x-rays would cure them. Next time you are partaking of the latest fad in medical care, please take heed of this article. Just because it doesn't say "Snake Oil" on the label, you should be careful.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.