The numb hands, good chance it will get worse until your body get gets used to it and will eventually go away until you up your dose again. Don’t let it get worse go 4iu every other day. It should go completely away, then stay there a while and eventually you should be able to go back to 3iu everyday with out a problem. My hands got really bad, so bad It took 3 weeks for it go away after being completely off. A lot of guys have had success starting a 1iu and increasing it 1iu every week or two. Your going to have to figure out what works for you, good luck buddy.