Neonatal jaundice is a common phenomenon and a unique condition in newborns. If it is normal physiological jaundice, it generally subsides within two weeks for full-term infants born after 37 weeks. This means that after two weeks, the jaundice is essentially gone; the skin and eyes are no longer yellow, and bilirubin levels are typically below 6-7, which is considered normal. For premature infants, the jaundice generally clears within four weeks. If the jaundice persists longer, there might be some pathological factors involved, and it is advisable to visit a hospital for a thorough evaluation by a doctor to determine if any special treatment is needed.