Jaundice is not a disease by itself. It is a sign that the liver is under stress. When the liver is not working properly, a yellow pigment called bilirubin starts building up in the blood. Because of this, the skin and eyes slowly turn yellow. Many people also feel weak, tired, and low in appetite. Sometimes there is nausea, mild fever, or heaviness in the stomach. Urine may look dark, and stools may become pale. These signs should not be ignored.