No i have never had an injury to my back except for a car wreck but I have always had back pain. I just thought since I have had so much leg injuries and feet that maybe it settled in my left side since I was laid up so long with my foot propped up above my heart from my knee surgeries.. I had alot os swelling in the area.. I have times now where the only relief i do get is from walking laying down gets really uncomfortable after a while or sitting in a chair gets really incomfortable.. Thanks Lisa