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Difference Between Physiological & Pathological Jaundice. Physiological and pathological jaundice both result in a yellow tint to the skin, whites of the eyes and mucous membranes but are caused by different conditions. Physiological Jaundice. When jaundice occurs in a healthy baby, it is considered physiological jaundice.
Medical Definition of Physiologic jaundice of the newborn. Physiologic jaundice of the newborn: Yellowish staining of the skin and whites of the newborn's eyes (sclerae) by pigment of bile (bilirubin). In newborn babies a degree of jaundice is normal. It is due to the breakdown of red blood cells (which release bilirubin into the blood) and to the immaturity of the newborn's liver (which cannot effectively metabolize the bilirubin and prepare it for excretion into the urine).