Cornskin, or keratosis pilaris, improves with age but does not disappear on its own. It is a common chronic follicular keratosis, with a family history of onset in adolescence, usually without conscious symptoms and occasionally with mild itching. It appears as a normal skin-colored, pinpoint follicular papule with a light brown corneal plug at the tip containing curly fine hairs, which can become slightly depressed after removal, but the plug will grow back. The disease is hereditary and usually does not disappear on its own, and it is difficult to be completely cured at the current medical level. Chicken skin mostly occurs on the extensor side of the limbs, occasionally accompanied by erythema, and later appear pigmentation. Patients can apply topical vitamin A acid ointment or cream, salicylic acid ointment, and urea ointment to relieve symptoms and reduce lesions and discoloration. In addition, they should keep the skin clean and eat more vitamin-rich vegetables and fruits, such as kiwi and orange, to avoid stimulating the skin lesions with certain improvement effect.