Hi XXXXX For 3 years I have had a sharp pain in my chest on the left side it comes and goes ,its like a knife pushed into my chest some days other times its a dull ache .I have told my doctor about it, he says its my back ,but it comes when I have no back ache. I walk my dog every day and have a healthy diet, I do not drink ,I do work at my desk for I am an artist is this causing my problem, WWW.WWWW.WW