Hi hy huband hasC.O.P.D and emphysema he dose not cope very well with it he had it now for quiet a while he keeps getting a bad pain in his back between his shoulder blades I told to se doctor but all he saids it a go I feel for him as he s trying so hard to carry on as normal but slower he s 59y old I hate seeing him like this all so how do we know what stage he at thank u