#1 See a doctor. Have a stress test done and an ECG. If OK, go to #2:
#2 This is why I use North Road Bars. No more 'restless hands' trying to find the sweet spot on the bars. I can leave them where they are supposed to be all day. No numbness, tingling, bent wrists or pain where the ulna joins the underside of the elbow.
Go to the doctor!