Cracks in your hands can be caused by a skin problem such as eczema or psoriasis, but even when it's cold outside and the air inside is dry, some people are more prone to cracks in the fingers or knuckles.
A chasm is a cracked piece of skin. If your skin is dry, your skin is less elastic and this can sometimes cause a tear. With dry hands and various skin conditions you will suffer from it faster.
Fissures in the hands often heal with difficulty. Every time you move your hand, a fissure can burst open again. Furthermore, your hands come into contact with corrosive substances, from soap and cleaning agent to the juice of vegetables and fruit when you are cutting them.
Unfortunately, there are no miracle cures for chapping. You can't do much more than the obvious: