Redness and cracking on the back of the hands may be caused by environmental factors, ringworm or eczema. 1. Environmental factors: If the environment is cold and dry, such as in winter, dry cracking and redness can occur due to reduced sebum secretion and dry skin. 2. Ringworm: related to fungal infection, it can lead to localized erythema, desquamation, dryness and rupture on the back of the hand, blisters or vesicles can also be seen, which can be manifested as dry cracks and redness on the back of the hand. 3. Eczema: related to a variety of internal and external factors, the back of the hand eczema can also be induced by long-term cleaning excessive, resulting in the destruction of the skin barrier structure, the skin is extremely dry and dehydrated can appear back of the hand cracked red and other symptoms. If the back of the hands red and cracked, it is recommended to go to the hospital to improve the relevant examination, receive professional diagnosis and treatment.