In the early stage of the disease, the characteristics of the skin lesions are basically the same as those of the papular scaly type, and then with the prolongation of the disease period and the development of the disease, there is a gradual appearance of hyperkeratosis, roughness and sweatlessness, and the texture of the skin is widened and deepened. This type is characterized by thickening of keratin, desquamation and dryness, involving the whole foot metatarsal and even spreading to the dorsum of the foot, with symmetrical onset of both feet. Keratosis pilaris is characterized by hyperkeratosis due to the slow shedding of stratum corneum cells, resulting in the accumulation of stratum corneum cells. In the winter dry climate, often chapped, and some even to the summer can not be restored. Usually pay attention to personal hygiene, shoes and socks are washed and changed.