I've suffered a bad back since 1977, its rarely took me off work but equally I've spent months and months on end with stiffness, achiness etc and it brings you near to depression . Docs seem unable to do anything, just muscular rheumatism they say.
Stretching...which I don't do anywhere near often enough, paracetamol and occasional low dosage of Diclofenac / Voltarol for me. (I buy my Voltarol in Spain at an absolute fraction of the cost here...but always have taken it sparingly and only when the stiffness is overwhelming) Diclofenac / Voltarol of course was taken off prescription then taken off override the counter a few years later due to potential heart problems I gather.