Not always, but sometimes when I hold metal in my hand I will suddenly experience a really painful, deep aching feeling in my joints. If I let go of whatever item I may be holding it will stop. Can you please help explain this to me. It only started happening about a year ago and is very strange. It only will happen in my left hand, not in both. I have asked once while at a medical facility about this and was kinda shrugged off and looked at like I was weird.