My boyfriend has back pain that he says it is not anything like he has injured himself. He has had it for about 2 months. He is 48, weighs 270 and is 6'1. and has had a severe sleep disorder for most of his life. He said that the pain has settled in his left shoulder blade. He has had a blood test, an ekg etc and the doctor found nothing. He has no fever, chills and doesn't seem to have a virus. He has been working out for 5 or 6 months but has no injury. If he takes different pain medicine it will ease the pain a little but he has had sever pain where he could almost cry. Could this be some kind of infection? Could you please give us some guidance.