I guess the best way to describe it is that it feels like something foreign is in my hand. I noticed that hand looks a bit more shrively than my other one, so now my paranoid mind is thinking some kind of sensory response to a newly atrophied area. You now how the mind works in these cases. My head also feels very heavy today, which raises the usual alarm bells too. More reasonably though, I have some kind of neck tension that is causing the sensory issue in my hand.