The cause of chicken skin, or keratosis pilaris, is unclear and may be related to genetic factors, dry skin, age, endocrine factors, and other factors. 1. Genetic factors: keratosis pilaris is an autosomal dominant disease similar to follicular ichthyosis. 2. Dry skin: the disease is more likely to occur in people with dry skin. 3. Age: Keratosis pilaris can begin to appear in childhood, but the lesions become obvious only in youth. 4. Endocrine factors: hypothyroidism, Cushing’s syndrome and glucocorticoid treatment have a high incidence and severe lesions, suggesting that endocrine factors can influence the development of the disease. 5. Other factors: such as vitamin A deficiency, metabolic disorders. Keratosis pilaris patients should go to the hospital in time, under the guidance of the doctor standardized treatment.