Jaundice can be measured by instruments. In hospitals, there are transdermal bilirubin monitors, but at home, if no facilities are available, jaundice can only be detected visually, as the skin of newborns is thin and tender, and capillaries are rich, when the serum bilirubin level reaches 85 μmol/L or 5 mg/dL, jaundice can be seen visually. Jaundice in babies starts on the face and gradually spreads to the trunk and extremities, and in severe cases, jaundice may also appear on the palms of the hands and feet. However, parents are not medical professionals and may be negligent in observing jaundice. It is recommended that jaundice should be observed at home by the same person and monitored by one person at the same time, in the same place, at the same time and under the same light. If the jaundice is gradually on the rise and the jaundice is getting worse, because parents cannot tell when it is severe jaundice, it is hoped that formal help will be sought at the hospital.