Neonatal jaundice requires differentiation of bilirubin levels and regular treatment. Sun exposure usually takes 20 to 30 minutes at a time. Newborn jaundice, sunbathing once should not be too long, too long ultraviolet rays may cause damage to the skin, once 20 to 30 minutes is appropriate. At the same time sun exposure time as far as possible to choose in the morning or evening, this time the intensity of ultraviolet light is moderate, not easy to cause damage to the child. When your child is exposed to the sun, expose as much skin as possible to receive the sun’s rays, while taking care to protect your baby’s eyes and external genitalia and other parts of the body to avoid sunburn. The blue light in the sun can prompt the free bilirubin in the blood to turn into bound bilirubin, which is excreted from the liver and speeds up the rate at which jaundice subsides. However, if bilirubin levels are high, sun exposure alone is often ineffective. Not all neonatal jaundice can be resolved by sun exposure. If jaundice peaks too high, progresses too quickly, lasts too long, or if the baby has a combination of bloating, vomiting and other discomforts, you need to consult a doctor to find out the cause and then take appropriate treatment measures.