What is the cause of hand cracking?

There are many causes of hand cracking, such as eczema, fungal infections, and frequent labor and exposure to chemicals. Hand eczema has a high incidence, but it is difficult to determine the exact cause, and some patients may also be related to occupational or emotional factors. Treatment is generally used with glucocorticoid cream and 3% boric acid solution or 0.1% ethacridine solution.