Keratosis pilaris and keratosis pilaris are the same type of disease, but the two diseases are not exactly the same. Keratosis pilaris is also known as hair keratosis, hair moss, hair furunculosis, etc. Keratosis pilaris occurs in childhood, gradually worsens in adolescence, and gradually improves in adulthood, and the prevalent sites are mainly on the outer side of the upper arms and thighs, and in severe cases on the forearms, shoulder blades, buttocks, calves, etc. The general lesions are symmetrical, and the lesions are mainly small and sharp follicular papules, scattered, but not The lesions are mainly small, sharp follicular papules that are scattered but not fused and resemble chicken skin, so they are called goose bumps by the common people. Follicular keratosis can occur at any age, but is generally more common between the ages of 8 and 16, and less common under the age of 5. The lesions can occur on the head, face, trunk, and extremities where sebaceous glands are abundant, and the lesions are also symmetrically distributed.