Neonatal jaundice generally appears on the 2nd to 3rd day after birth and can manifest with yellowing of the skin, conjunctiva, and oral mucosa. The degree of jaundice varies, usually more noticeable on the face and chest, but not present on the palms of the hands or soles of the feet. It is most apparent on the 4th to 6th day after birth. The duration of jaundice also varies; in full-term infants, jaundice typically subsides within 10-14 days after birth, whereas in premature infants, it can last until the third or even the fourth week. During this period, infants with physiological jaundice are generally in good condition without any other discomfort and do not require treatment. However, pathological jaundice must be investigated for its cause. Pathological jaundice is primarily characterized by an early onset, severe degree, prolonged duration, or recurrence of jaundice. In such cases, it is classified as pathological jaundice, and it is crucial to actively search for the cause and treat accordingly based on the identified cause.