Chicken skin that is keratosis pilaris, Vitamin A acid can only alleviate the symptoms of keratosis pilaris, can not be cured cure, usually less severe symptoms of chicken skin patients comply with the doctor’s instructions to use this drug 1 ~ 2 weeks after the effect can be seen, the symptoms of severe symptoms comply with the doctor’s instructions to use the symptoms can be significantly improved after 4 ~ 6 weeks. Keratosis pilaris is a chronic follicular keratosis pilaris, the cause of which is usually related to genetics, vitamin A deficiency, endocrine factors, etc.; its typical manifestation is the follicular keratin plugs or keratinized papules consistent with the pores, accompanied by varying degrees of perifollicular erythema, the skin is chicken skin-like appearance. Current treatment is often based on oral medication (e.g. vitamin A, vitamin E, etc.), topical medication (e.g. 0.1% retinoic acid cream, 10%~20% urea cream, 3%~5% salicylic acid ointment, etc.), and laser treatment. Among them, retinoic acid cream belongs to retinoic acid drugs, which can effectively remove skin keratinization, remove the excessive keratinized layer on the skin surface, and have a certain improvement effect on the perifollicular keratosis, but not a cure. Usually the symptoms of mild chicken skin patients follow the doctor’s instructions to use this drug 1 ~ 2 weeks after the effect can be seen, the symptoms of serious patients follow the doctor’s instructions to use 4 ~ 6 weeks after the symptoms can be significantly improved. It is recommended that the patient to the hospital in time, under the guidance of the doctor, combined with their own condition, to determine the appropriate treatment program, follow the doctor’s instructions to use this drug.