It is well known that sun exposure has benefits, especially for pediatric patients, to promote calcium absorption and facilitate vision recovery and visual development. In fact, sunlight is helpful for jaundice because sunlight is a compound light, with ultraviolet and blue light, and the blue light within sunlight is helpful for the reduction of jaundice in children. However, as a doctor, parents are not advised to let their children sunbathe for a long time, because the strongest sunlight is actually ultraviolet light, and long-term exposure to ultraviolet light can cause damage to the child’s skin, and appropriate activities can be carried out outdoors, but cannot completely subside the yellow, if the jaundice exceeds a certain value, it is best to take medication or professional blue light treatment under the guidance of a doctor.