Summer heel cracking hard skin is considered to be the result of dry skin dehydration, but does not exclude eczema, ringworm and other disease factors. 1. Dry skin dehydration: the skin is easy to dry and lack of water, if the skin for a long time in the state, the keratinized layer is prone to necrosis, shedding, the symptoms of cracked heels and hard skin. 2. Eczema: due to genetic, immune, endocrine and other factors leading to eczema, including keratosis pilaris type eczema, the main clinical symptoms of hyperkeratosis of the skin, dry cracks, flaking, and so on, and then appeared on the heels of cracked hard skin symptoms. 3. Tinea pedis: due to fungal infections of the feet caused by fungi, mainly red trichophyton, in which the scaly keratinized tinea pedis, often manifested as diffuse skin dryness, desquamation, the symptoms of the serious will appear cracking symptoms, the patient will be manifested as cracked hard skin on the heels. It is recommended that the patient go to a regular hospital in time, a systematic examination to confirm the cause of the disease, under the guidance of the doctor for targeted treatment.