Neonatal jaundice is one of the common symptoms during the neonatal period. It can be a normal physiological phenomenon, or it may be an external manifestation of certain diseases. Neonatal jaundice is divided into physiological jaundice and pathological jaundice. Physiological jaundice does not require intervention, and the baby's general condition is still acceptable. Typically, physiological jaundice in full-term infants appears between two to three days after birth, peaks at four to five days, and subsides around ten days, generally not lasting more than two weeks. In preterm infants, it may last slightly longer, but generally, jaundice does not exceed four weeks. If the progression of jaundice is rapid, severe, or appears early, pathological jaundice might be considered. Pathological jaundice may be due to certain pathological factors causing abnormal jaundice. Depending on the cause of the disease and whether there is timely intervention and treatment for jaundice, the resolution time may also vary.