Oh jesus i feel your pain mate as had this for quite a few years and been for all sorts of scans,xrays,physio etc etc you name it i tried it and fuck all worked !!!!
Eventually moved to where i stay just now and one of the customers i do work for is a sports and remedial massage therapist and suggested letting her have a go, was a bit dubious at first as always looked at getting a massage was a bit seedy and that when you roll over onto your back to show off your wigwam you would be asked it you required " relief" for that straining muscle !!! Nudge nudge wink wink !!!!!!
Anyway i thought i would give her a go as had been suffering with it for far too long and was at the stage where i would try anything.
First session was for about 45 mins and came away from that almost worse than when i went in but after a day or two i started to slowly feel better and went back every few weeks for an hour at a time and fuck me did she not completely cure me !!!
Used to get a really bad bout of it at least once a month and was as good as paralysed with it ( unless you have experienced this for yourself you cant even begin to imagine the pain making even the slightesr movement makes !!! ) and since i have been seeing this lady i have been almost pain free for over 3 years, still get the odd twinge now and then if i lift something i shouldn't but thats maybe due to the fact i aint been back to see her for a few months !!!
Seriously though i would recommend trying this mate as has worked wonders for me.