Neonatal jaundice is one of the common symptoms in the newborn period. It can be a normal physiological phenomenon or a manifestation of certain diseases. Jaundice is divided into physiological jaundice and pathological jaundice. Generally, physiological jaundice in full-term infants lasts no more than two weeks, while in preterm infants, it lasts no more than four weeks. If the resolution of jaundice is delayed, it indicates pathological jaundice. Pathological jaundice generally requires investigation of the cause. If the cause is not eliminated, the jaundice will persist and thus resolve slowly. For instance, if an infection is uncontrolled, or there is hemolysis, reduced thyroid function, or genetic diseases such as G6PD enzyme deficiency, abnormalities in the red blood cell membrane, or problems with the liver or bile ducts, these could all lead to slow resolution of jaundice. Therefore, if the jaundice lasts for an extended period, it is generally advisable to visit a hospital for relevant tests.