left, though it CAN be right, or chest, or legs, or neck, or whatever. but generally, left arm.

the symptoms sound more to me like blood pooling in the fingertips due to gravity and less-than-optimal circulation. I get the same thing.

If Pip notices a little puffiness in his fingertips, I'd say that's exactly what's going on. best solution is proper hydration and, of course, more exercise more often :)

hi pot, my name is kettle.