What Is Infant Jaundice? What Causes Infant Jaundice?

Infant jaundice, also known as physiological jaundice, is a condition in which the skin, and sometimes the sclerae (the white part of the eye), of the baby appear yellow. The color of the skin and sclerae varies depending on levels of bilirubin in the bloodstream. Bilirubin (bil-ih-ROO-bin) is the substance that causes yellowing of the skin and sclerae.