Keratosis pilaris is commonly known as “chicken skin”. In the arms and femur of children, it looks like light brown bumps in line with the pores, and feels hard and rough to the touch. Generally, there are no conscious symptoms, and some of them are accompanied by mild itching. Although it does not affect the general health, the disease can reach its peak in adolescence, and it is more frequent in women, affecting beauty and dressing. Therefore, it has also become a disease that affects young people. There is no eradication therapy for this disease, but topical skin keratin softening or keratolytic can reduce the symptoms. For example, vitamin A acid ointment, 20% urea ointment. If the symptoms are serious or complicated with ichthyosis, you can take vitamin E and A orally.