Chicken skin generally refers to keratosis pilaris, a chronic follicular keratinizing skin disease. The cause of the disease is unknown, and may be related to heredity, vitamin deficiency, external environmental stimuli, endocrine disorders and other factors. 1. Heredity: chicken skin has a certain genetic predisposition, often manifested as autosomal dominant disease. Patients with chicken skin caused by genetic factors can improve their symptoms by strengthening skin care. 2. Vitamin deficiency: excessive picky eating, long-term non-intake of vitamin A-rich food, easy to lead to vitamin A deficiency, which is easy to induce perifollicular keratinization, chicken skin-like changes. 3. External environmental stimulation: the environment of low humidity, dry air, and oil and other substances to stimulate the skin, it is easier to induce chicken skin. 4. Endocrine disorders: patients treated with glucocorticoids or hypothyroidism are more likely to develop damage or cause aggravation of periorbital keratosis. Patients with chicken skin generally do not require treatment. Patients with obvious symptoms or with treatment requirements should go to the dermatology department of regular hospitals in a timely manner.