I know all about bad backs, car crash december done me in, I have had physio ever since and acupunture even looked like hellraiser at one point (is it me but it hurts like hell) the responce I got when i first clenched my fist was I have found the problem this is where the pain is coming from (so does it again just to watch me think hes a sadist, MRI scan will show what the problem is. I myself had nerve damage, leg leg didnt work right and disk bulge as luke says sack split (you would not move at all you would scream, I just eat painkiller all day, get needles stuck in me and physio I think just likes to make me take just a little more pain each time I go, they do work, I would recommend using a BUPA one expensive yes worth for it sure. Not looking forward to this winter but im sure I will live. I count myself as lucky was about 5miles an hour under being crippled and bed ridden for rest of my life.
Oh by the way not try to put the wollies up anyone, if you have a problem with your back etc get it sorted, one of my customers didnt and shes in a wheel chair now by just walking down the road and before there was nothing wrong with her.