I had been suffered from dry for a couple of months and I have done everything to relieve. I have and am using Imuran which affects the immune system.
But I finally found the reason to my problem and how to resolve it in short and long term:
1- The problem was because of to either paper or ink (I figured out that the problem happened when I dealt with hundreds of pages of print in a week).
2- I could keep it almost in the same condition (or slightly better) by keeping it wet using ointment or skin creams. But "Betaderm" ointment (needs prescription) had better results (used it for 2-3 weeks). Especially the ointment works well after bathroom when the skin is fresh.
3- I didn't know this is because of paper/ink (I thought of mouse, notebook touchpad, latex gloves, etc.) so thanks to a pharmacist in Edmonton who advised to use cotton gloves, I avoided touching almost everything at work.