1, physiological jaundice Lighter cases are light yellow limited to the face and neck, or the trunk, the sclera can also be yellow 2 to 3 days later fade, to the 5th to 6th skin color back to normal; heavy jaundice also first head and then feet can be throughout the body, vomit and cerebrospinal fluid can also be yellow for up to 1 week or more, especially individual premature infants can last up to 4 weeks, their feces are still yellow, no bilirubin in the urine. 2, the jaundice color Lighter light flower color, the heavy color is darker, but the skin is ruddy yellow in red. 3, jaundice site Most often seen in the trunk, sclera and proximal extremities generally but elbows and knees. 4, neonates General condition is good, no anemia, liver and spleen are not enlarged liver function is normal, does not occur nuclear jaundice. 5, preterm infants Physiological jaundice is more common than in full-term infants, can be slightly delayed 1 to 2 days, the jaundice is more severe remission is also late, can be delayed to 2 to 4 weeks.