Neurologist things the thing going on with my hand is probably erythromelagia.  It is often related to peripheral neuropathy according to http://www.erythromelalgia.org/whatisem.aspx

     It’s been a week since my last Metformin increase, pain has dropped to zero tonight.  Went to the gym and got a workout in.

     Need to go to bed now as I have to be up at 4:45AM.