Children with yellow skin may be pathologic jaundice or physiologic phenomenon. 1. Pathological jaundice: Jaundice is usually caused by abnormal bilirubin production and excretion due to liver and gallbladder diseases, resulting in high bilirubin in the blood; it may also be caused by excessive bilirubin production due to hemolytic diseases. You can check liver function, blood routine, liver and gallbladder ultrasound to confirm the diagnosis. 2. Physiological phenomenon: such as eating too many oranges, carrots, etc., causing carotenemia, causing yellowing of the skin. In this case, you need to stop eating such food, with the passage of time, through the body metabolism excluded from the body, the yellowing of the skin will gradually disappear. Yellowing of the skin, it is recommended to go to the hospital to determine whether it is a physiological phenomenon or pathological jaundice, if it is pathological jaundice need to be treated in a timely manner, do not wait to observe, to prevent adverse consequences.