6mp and rash

I've been taking 50mg of 6mp for almost exactly 2 months now...about a week or two after I started taking it I've developed a rash primarily on my fingers (some on my legs too).

It's REALLY itchy, seems to start as tiny little clear liquid bumps and then gets really dry, mostly between my fingers. It's driving me insane and I don't know what to do about it....we're bumping my 6mp to 75mg since blood work has been fine but I'm worried it's going to make it worse...it's already bad enough that it keeps me up some nights. Bad enough that I wake up 2-6 times because of UC...hate to wake up to itchy skin also.

Anybody else have similar experience and what do you recommend to try? My doc is worried that if it gets too much worse I may need to stop 6mp. I use moisturizes to keep it from drying out during the day and I've tried a cortizone cream which seems to help very temporarily.

Thanks!