To Truth, Stones and Blue, as I have posted elsewhere, spinal decompression helps with disc problems. The big machines work, but we are charged about $250.00 per session and at least 10 sessions are suggested for relief and real bad problems require 30 sessions. When I went for mine the machines pulled me apart at 112 lbs pressure and increased 2 lbs every session to end at 130 lbs of traction. I have since found that I can gain relief by lying on my back, jacking my legs up, putting my hands on the top of my thighs down by the crease between body and thighs and pushing my legs away from my shoulders, hard. I increase the pressure slowly for one minute and then release it so as not to cause a radical release. Sometimes I will get a clunk when the spine aligns and other times it just creates more space between the vertebrae to relieve the pressure of the disc gel pushing against the spinal cord. If you decide to do it and are able to do it(arthritis), I hope it helps. Also, if you have weak bones I certainly would not recommend it.
My back is basically fine, now. I just lost control of some muscles and had some bad aches because of the gel pushing against my spinal cord and the spinal decompression took care of it for me.
Hope you don't mind me going off topic.