question: I workout with heavy weights and also smoke marijuana. Lately, I ve had a tingling pain in my left arm that s worse when I workout or smoke? The pain is now everyday all the time and starts in my upper left shoulder/armpit/lung? and goes thru the painful elbow and tingles all the way to my left hand.Any ideas? I have an apt with my doc next Wed., but the pain is getting worse and all of a sudden today I have all day diarrhea, can t really eat and body aches (along with the left side tingles/pain). Also - sometimes when I breath in deep - it hurts or I hear cracking/popping in my back/chest?? I m getting worried....