How To Reduce Pain In Back/elbows/legs?

recently i started having back upper back pain that is mild. At times my back feels cold. I also noticed that my left elbow hurts when i touch it and both my legs hurt at times. I have gone to see a doctor and he gave me anti-inflammatory medicine (naproxen). It helps my arm, but my back has not gotten better. i dont know what i can do to relieve the pain. help....please