A small area of sun exposure may not be useful for jaundice, while a large area of sun exposure may be useful, but it is recommended to go to a regular hospital for blue light treatment. There are many types of jaundice, and sun exposure is only for physiologic jaundice in newborns. Usually, sun exposure to reduce jaundice needs to fully expose the baby’s body to sunlight in order to play a slight effect to a certain extent, so the sun exposure area is very small generally on jaundice may not work. Although large areas of sun exposure can be helpful, it is not recommended to treat jaundice by this method. Parents are advised to take their children to regular hospitals to receive blue light therapy in order to reduce unconjugated bilirubin, and during this period, the serum bilirubin level needs to be closely monitored for changes. In addition, physiologic jaundice usually resolves spontaneously within 2 weeks in term infants and within 4 weeks in preterm infants. In conclusion, when jaundice is detected, it is necessary to go to the hospital in a timely manner and cooperate with the doctor for active treatment if necessary, so as to avoid delaying the condition.