The cause of keratosis pilaris is usually caused by human factors, such as epilation, shaving, shaving and so on. During the operation, the strength changes the direction of hair growth, and over time, a small bump will form. Hereditary factors, the understanding of the causes of keratosis pilaris is known to be inherited from parents, that is, congenital, is the main cause of keratosis pilaris. In addition, due to the slow metabolism, making the stratum corneum thicker, hair in the growth process, can not penetrate the epidermis, over time will form perifollicular keratosis. Pay attention to usually do not eat spicy stimulation and greasy food, eat more green leafy vegetables and fruits. In terms of treatment, it is recommended that you can take vitamin A orally, or eat more food rich in vitamin A, which is helpful for this disease. Topical skin keratin softening or keratolytic agents, such as topical retinoic acid, salicylic acid ointment, etc., the treatment effect is better.