Whenever I use my basses with nickel or superalloy I can feel them start to get itchy/swollen feeling on my fretting hand not really my picking hand.....then after an hour they hurt and really sore and cant play for a day or 2.....whenever I use my bass with chromes or labella flats they dont hurt at all. I mean even after playing 10 minutes I can start to feel them getting aggravated! Am I allergic to nickel? and if so whats the warmest round steel string can I use? I have sadowsky blue nickels on my EBMM sterling classic and love the tone! But I can only play it for an hour before it knocks me out of commission! Someone please recommend me a warm steel round. for my sterling.