One day RJMC is going to post a thread about how cancer is going to kill him in a week, and we'll all be like "OH THAT RJMC! HE'S SO SILLY AND FOREIGN!!!"
This could be many different things. It could range from poor circulation to a pinched nerve, diabetes, this also could be signs of a small to moderate size stroke due to the unequal "power" in both hands. Just some possibility.