Is there a distinguishable pain difference when your skin hurts as to which is causing the pain? I've been experiencing this off and on but this past week it won't let up. I can't stand anything to touch my arm. It stings when anything touches it. Fine when it's left alone. The skin isn't dry or anything like that...looks normal but feels awful when touchedl. Is there anything I can do to ease this up? I've tried everything and not even the oxycodone helps. It's getting old.