Hand long hard skin cracking can be seen in hand eczema, ringworm and other diseases. 1. Hand eczema: common in some frequent contact with soap, laundry detergent, detergent, disinfectant, detergent and other chemicals special occupational groups, or housewives. When the hand skin is subjected to various physical and chemical stimuli for a long time, it will easily lead to allergic reaction of the hand skin, resulting in hardening and cracking of the hand skin. 2. Ringworm: It is a disease caused by hand skin infected with dermatophytes, which is contagious. For example, when suffering from hyperkeratosis tinea cruris, it can lead to hyperkeratotic lesions on the palm of the hand and fingers, resulting in hypertrophy, dryness, flaking and other symptoms of the skin on the hands, which can be manifested as hard skin and cracks on the fingers. When the hand long hard skin cracking, in addition to keep the local skin moisturizing and clean, but also need to go to the hospital dermatology consultation, clear cause, under the guidance of the doctor for targeted treatment.