What is a common physical finding in a neonate with jaundice?

In newborns, jaundice is characterized by a yellowish discoloration of the skin and the sclera of the eyes (the white part of the eyes). This occurs when there is an accumulation of bilirubin in the bloodstream, which can happen as the liver, still maturing in neonates, struggles to process bilirubin effectively. The yellow discoloration often first appears on the face and can progress to involve the trunk and extremities as bilirubin levels rise.

Recognizing jaundice is crucial in neonatal care because it can indicate underlying conditions that need monitoring or treatment. The other options do not align with the typical presentations associated with jaundice. For instance, cold extremities would not be a typical feature, as jaundice itself does not cause temperature variations. Blue-tinged lips may suggest cyanosis or lack of oxygenation rather than jaundice. Increased urine output would not be a common finding directly associated with jaundice and does not indicate bilirubin metabolism issues in the neonate. Thus, the yellow discoloration is the hallmark sign that clearly identifies a neonate with jaundice.