I'm not too sure if I am in the right area. I started having a slight weakness in my left hand a couple of days ago. Then last night I had pins and needles in my left hand (but not as severe as when it goes to sleep). This morning I noticed along with the slight pins and needles feeling there is a pain in my palm between my ring finger and little finger, radiating up inner arm and around the outside where elbow is and up to my shoulder. A collegue suggested it is carpal tunnel syndrome but wouldn't the pain stop at the wrist? I'm thinking that it is a trapped nerve in my shoulder. I think I know what caused it: I tend to lean on my left hand (resting on chair) when working on my computer. I just want to make sure it isn't something that needs urgent medical attention - my first thought was MS or something serious like that.