Hands always cracked can be caused by the lack of vitamin A, vitamin B, etc. It can also be caused by hand eczema, fungal infections and other factors. 1. Vitamins: Cracked hands may be caused by the lack of vitamin A or vitamin B. Vitamin A and vitamin B play an important role in the formation of skin and body tissues respectively, and the lack of these vitamins will make the skin oil secretion abnormal, which will make the hands always cracked. 2. Hand eczema: hand eczema is a type of eczema, most of the slow onset of the disease, manifested as dry dark red spots on the hands, local infiltration and hypertrophy, the edge of the clearer, the winter is often the formation of fissures, so there will be a hand always cracked mouth. 3. fungal infection: tinea versicolor is the most common superficial fungal disease, scaly keratinized tinea versicolor occurs in the palm and plantar area, is diffuse skin roughness, thickening, desquamation, dryness, easy to crack or even bleeding in winter, can be accompanied by pain. If you have cracks on your hands, if the symptoms are severe or not relieved for a long time, or if they are accompanied by other obvious symptoms, it is recommended that you consult a doctor in a timely and active manner.