However, in our experience, most exclusively breastfed babies who are perfectly healthy and gaining weight well are still jaundiced at 5-6 weeks of life and even later. Do not stop breastfeeding for breastmilk jaundice. When the baby is getting little milk, bowel movements tend to be scanty and infrequent so that the bilirubin that was in the baby's gut gets reabsorbed into the blood instead of leaving the body with the bowel movements. If the baby is nursing well, more frequent feedings may be enough to bring the bilirubin down more quickly, though, in fact, nothing needs be done. If the baby is nursing poorly, helping the baby latch on better may allow him to nurse more effectively and thus receive more milk.
Phototherapy increases the fluid requirements of the baby.
If the baby is nursing well, more frequent feeding can usually make up this increased requirement. However, if it is felt that the baby needs more fluids, use a lactation aid to supplement , preferably expressed breastmilk, expressed milk with sugar water or sugar water alone rather than formula.