Chicken skin on the legs is usually a case of perioral keratosis, which is usually caused by genetic factors, endocrine factors and vitamin deficiencies. Chicken skin, also known as keratosis pilaris, often appears as small bumps on the outside of the upper arms, thighs, and even on the cheeks and neck. About 50-70% of patients with keratosis pilaris have a genetic predisposition, which is usually inherited in an autosomal dominant manner. It may also be associated with endocrine factors such as hypothyroidism or Cushing’s syndrome, and may be associated with vitamin A deficiency. Keratosis pilaris usually does not affect the health, there is no cure, if you feel that it affects the aesthetics, you can consult a doctor in a timely manner, and follow the doctor’s instructions for targeted treatment.