Neonatal jaundice is one of the common symptoms during the neonatal period, with about 80% of full-term infants visibly exhibiting jaundice. Jaundice may occur as part of the normal developmental process or as a manifestation of certain diseases. It is categorized into physiological jaundice and pathological jaundice. High levels of jaundice may indicate pathological jaundice. Generally, if the baby's skin and mucous membranes are obviously yellow, and the jaundice has spread to the limbs or even beyond the palms and soles, which are also notably yellow, it is a sign that the jaundice is severe. Parents can typically observe a clear yellowing of the sclera, the white part of the eyes. The baby may also show other signs of discomfort, such as significant crying and restlessness, pronounced vomiting or increased regurgitation, or even symptoms like abdominal bloating, diarrhea, reluctance to feed, prolonged feeding times, lethargy, or potentially even fever and other discomforts.