There are many reasons for dry cracked feet in summer, such as physiological factors, chapped eczema, keratosis pilaris and so on. 1. Physiological factors: summer due to the hot weather, many people will choose to wear sandals, slippers, which will lead to the feet exposed, due to the role of ultraviolet rays, the hot environment and other factors, resulting in the phenomenon of cracked feet in the summer crust. 2. chapped eczema: chapped eczema can also cause dry cracked feet with hard skin, mainly due to foot contact with external substances caused by allergic reaction or stimulation of inflammatory reaction, belongs to a special type of eczema, will lead to localized skin lesions, which can be manifested as crusting, peeling, cracking, and may also be accompanied by pain, itching. 3. Keratosis pilaris: Keratosis pilaris can also cause dry cracked feet with hard skin, mainly due to the symptoms caused by fungal infections, but also may be accompanied by pain, erythema, bleeding and other phenomena. Caused by the summer feet cracked hard skin reasons are very much, after the symptoms, it is recommended that patients go to the hospital in a timely manner to improve the examination, a clear diagnosis, under the guidance of the doctor to take targeted treatment.