Jaundice may have some impact, but it is not significant. The condition is categorized into physiological and pathological types. Physiological jaundice refers to a temporary jaundice caused solely by the characteristics of bilirubin metabolism, appearing 2 to 3 days after birth, reaching its peak between 4 to 6 days, and subsiding within 7 to 10 days. Preterm infants may experience a longer duration, with only mild loss of appetite as the main clinical symptom.