The reasons that can lead to cracked hands include hand skin dehydration, fungal infection, hand eczema, etc. It is recommended to go to the hospital to check the cause first, and then carry out symptomatic treatment. 1, hand skin dehydration: usually do not take good care of the hand, living environment is too dry or the body metabolism slowed down due to age can cause hand skin dehydration, serious will be cracked. You can use hand creams and other hand care products to hydrate the skin of your hands, you can also apply glycerin or petroleum jelly to moisturize your hands; 2, fungal infection: fungal infections in the hands can also lead to cracked hands, the main manifestation of fungal infection is a clear-cut erythema, flaking, accompanied by itching. Treatment requires the use of antifungal drugs as prescribed by the doctor; 3, hand eczema: slow onset, manifested as dry dark red spots on the hands, local skin hypertrophy, often forming fissures in winter. Treatment can follow medical advice on the use of topical glucocorticoids and other drugs, and pay attention to the hand skin moisturizing. Hand cracked mouth should be careful not to scratch, keep the hands clean to prevent aggravation of the disease.