i had ezcema since i was born. it got better ever since i've found out what triggered it. usually nuts and seafood (prawn).
one thing that i always do is to force myself to eat the things that makes me flare up. imagine how bad it was, i forced myself to eat peanuts. make sure you have loratidine (or some kinda anti-histamine/anti-allergen, can get from polyclininc) before you do it, sometimes it can get bad. but now i can safely say that peanuts don't make me flare up much anymore. heh.
i love prawn too (i'm those kind eat prawn shell and head also). so i force myself again lah. in the end flare up, stomach bloated, etc etc but now my skin is better again.
keep your dermasone close to you. this cream, you can get in big tub frm skin center. polyclinics will only give it to you in tubes. private doctors will give it to you in those lousy small containers (and charge you damn ex for it). so best choice is to go polyclinic and get referral to skin center and then stock up.
the weather screws up the skin too lah. but now rainy season not so bad leh? few weeks ago during the hot season my fingers would crack and bleed just from typing on laptop. quite miserable, i guess.
oh yeah, if you have ezcema, keep it clean. make sure you don't get fungal as well. i've had that before (ezcema AND fungal) and it was fucked. affects your nails and causes skin discolouration. of course, this will all disappear when its over lah.
i hope you don't have ezcema on your fretboard hand. that must really hurt..