Thanks I was awaking at night with severe pain in the middle of my upper back, however, it only occurred occasionally for a few days then would disappear sometimes for several weeks. Recently the pain has started to occur in the daytime and has become a constant problem (although not quite as severe as the night pains). My doctor initially thought it was a gallbladder problem and I had my gallbladder removed a couple of years ago. I'm a 70 year old woman in fairly good health and am on no prescription drugs. The pain is extremely uncomfortable and although I have been taking Tylenol for Back Pain, it doesn't really help. No one seems to know the cause of the pain.