i am suffering with backpain. it began as low back pain. latter as low back pain reduced with phisiotherapy and anelgesics and muscle relaxants, i started having pain  in upper back and then at the center af the chest.( there is strain and pain in the right leg also. )
Common causes of low back pain are-Poor postural habitsMuscular strainLigaments sprainHerniated discoidal stenosisOsteoporosisFibromyalgiaTo allow me to help you better, please let me know if you also have any of the following complaints:- Pain radiating to lower limbs- Paresthesia and numbness in lower limb-Weakness in lower limbs-Back pain develops after lifting heavy weight or strenuous activity-Pain associated with stiffness in your back-Pain aggravated on forward bending-Pain in other joints from you question it seems to be muscular in origin. I advise muscle relaxants like cyclobenzaprine, NSAIDs like diclofenac or tramadol and neurotrophic Chat Doctor. I send them for muscle strengthening exercises and Physiotherapy along with this. Loosing of excessive weight if you are obese also helps in relieving symptoms. Take it D also if you hardly go out in sun. Consult a pain physician or orthopedecian for further advice