hi i have a good idea how you feel had back pain for years and ended up with spinal fushion 5 years pain free then it has came back on and off been getting head aches went to doc check me over then sent me for xray turns out got arthritis in right shoulder and elbow i'm lucky i only work part time now (59) 2 days as handy man in hotel (mainly decorating) kills the shoulder doing ceilings (hammer) ,
went for injection at doc's and he said if it gets to bad then can have op his words were they cut you here(on top of arm shoulder joint ) and says they stick a grinder in there :lol: it is a joint where the bones don't join but just touch each other that where they stick the grinder according to doc he seemed to find it funny #-o
hope you get sorted asap all the best mate
pip