Yellow skin caused by the build-up of bilirubin in the blood. Jaundice may occur if the liver can’t efficiently process red blood cells as they break down. It’s normal in healthy newborns and usually clears on its own. At other ages, it may signal infection or liver disease. Symptoms include yellowing of the skin and whites of the eyes. Some newborns may require light therapy for a day or so. In other cases, treatment involves addressing the underlying cause.