I’m not normally one to endorse skincare products, but I had a lot of issues with dry/cracked hands as well as eczema and the like when I was younger… until I stumbled across this stuff. It sorted out my dry/cracked hands within a couple of days and I’ve sworn by it ever since.
https://boots.scene7.com/is/image/Boots/10005610?id=IaWaY2&fmt=jpg&fit=constrain,1&wid=504&hei=548
If you can get your hands on some (make sure it’s the concentrated stuff), then give it a try. It’s the reigning king of moisturisers, I’ve yet to come across anything else that even comes close. 