Hyperbilirubinemia in the Newborn
What is hyperbilirubinemia in a newborn?
Hyperbilirubinemia happens when there is too much bilirubin in your baby’s blood.
Bilirubin is made by the breakdown of red blood cells. It’s hard for babies to get
rid of bilirubin at first. It can build up in their blood, tissues, and fluids.
Bilirubin has a color. It makes a baby’s skin, eyes, and other tissues turn yellow
(jaundice). Jaundice may first appear when your baby is born. Or it may also show
up any time after birth.
What causes hyperbilirubinemia in a newborn?
During pregnancy, the placenta removes bilirubin from your baby’s blood. When a baby
is born, the baby's liver takes over this job. Your baby may have too much bilirubin
for many reasons.
During the first few days of life, babies aren’t able to get rid of much bilirubin.
This normal type of jaundice happens as a response to a baby’s reduced ability to
remove bilirubin. But it may be hard at first to tell if jaundice is being caused
by another problem.
Breastfeeding failure jaundice
Some babies don’t breastfeed well at first. This causes breastfeeding failure jaundice.
Not feeding well makes your baby dehydrated. It also causes your baby to urinate less.
This makes bilirubin build up in your baby’s body. Babies born between 34 to 36 weeks
of pregnancy are more likely to get this problem. These babies often don’t have the
coordination and strength to breastfeed well. But this condition is also common in early-term
newborns (37 to 38 weeks). It can also happen in any newborns who have had a difficult
start, especially if they were separated from their mother and unable to feed frequently.
It usually gets better once a baby learns how to breastfeed well.
About 2% of breastfed babies get jaundice. This happens later in their first week
of life. It peaks at about 2 weeks of age. It can last 3 to 12 weeks. It is not dangerous
but tests may need to be done for other problems that are dangerous. This issue may
be caused by a substance in breastmilk. This substance may increase how much bilirubin
the baby's body can reabsorb.
Jaundice from hemolysis
If your baby has Rh disease (hemolytic disease of the newborn due to having a different
blood type from the mother's), he or she may get this type of jaundice. This issue
can also be from having too many red blood cells or rare problems in which the red
blood cells are more fragile than normal. Hemolysis is the word for the process in
which the red blood cells break down and release bilirubin.
Jaundice caused by poor liver function
Jaundice can happen if your baby’s liver doesn’t work well. This may be because of
an infection or other factors. The liver is the part of the body most responsible
for getting rid of bilirubin. A problem with the liver can cause higher levels of
Which newborns are at risk for hyperbilirubinemia?
About 60% of full-term newborns get jaundice. So do 80% of premature babies. Babies
born to mothers with diabetes or Rh disease are more likely to have this condition.
What are the symptoms of hyperbilirubinemia in a newborn?
Symptoms can occur a bit differently in each child. They can include:
- Yellowing of your baby’s skin and the whites of his or her eyes. This often starts
on a baby’s face and moves down his or her body.
- Poor feeding
- Lack of energy
The symptoms of this health problem may be similar to symptoms of other conditions.
Make sure your child sees a healthcare provider for a diagnosis.
How is hyperbilirubinemia in a newborn diagnosed?
The timing of when your child’s jaundice first starts matters. It may help his or
her healthcare provider make a diagnosis.
- First 24 hours. This type of jaundice is often serious. Your child will likely need treatment right
- Second or third day. This is often physiologic jaundice. Sometimes it can be a more serious type of jaundice.
It's important to be sure the baby is getting enough milk at this point.
- Toward the end of the first week. This type of jaundice may be from breastmilk jaundice but may be due to an infection or
other rare serious problems.
- In the second week. This is often caused by breastmilk jaundice but may be caused by rare liver problems.
Your child’s healthcare provider may do the following tests to confirm the diagnosis:
- Direct and indirect bilirubin levels. These levels show if bilirubin is bound with other substances by your child’s liver.
Normal physiologic jaundice involves indirect bilirubin. Jaundice due to more serious
problems can have high levels of either type of bilirubin.
- Red blood cell counts
- Blood type and testing for Rh incompatibility (Coomb's test)
How is hyperbilirubinemia in a newborn treated?
Treatment will depend on your child’s symptoms, age, and general health. It will also
depend on how severe the condition is.
Bilirubin absorbs light. High bilirubin levels often decrease when a baby is put under
special blue spectrum lights. This is called phototherapy. Your child may get this
treatment in the day and night. It may take several hours for it to start working.
During light treatment, your baby’s eye will be protected. Your baby’s healthcare
provider will check your baby’s temperature. He or she will also test your baby’s
bilirubin levels. This will tell if phototherapy is working.
Fiber optic blanket
A fiber optic blanket is another form of phototherapy. The blanket is usually put
under your baby. It may be used alone or with regular phototherapy.
This treatment removes your baby’s blood that has a high bilirubin level. It replaces
it with fresh blood that has a normal bilirubin level. This raises your baby’s red
blood cell count. It also lowers his or her bilirubin level. During the procedure, your
baby will switch between giving and getting small amounts of blood. This will be done
through a vein or artery in the baby's umbilical cord. It is only done in an intensive
care nursery when bilirubin levels are extremely high. Your baby may need to have
this procedure again if his or her bilirubin levels stay high.
Feeding with breastmilk
The American Academy of Pediatrics says that you should keep breastfeeding a baby
with jaundice. If your baby has not been getting enough milk at the breast, you may
need to supplement with pumped breastmilk or formula.
Treating any underlying cause of the condition
This may include treating an infection. In very rare conditions a liver transplant
may be needed.
What are the complications of hyperbilirubinemia in a newborn?
High levels of bilirubin can travel to your baby’s brain. This can cause seizures
and brain damage. This is called kernicterus.
What can I do to prevent hyperbilirubinemia in my newborn?
This condition can’t really be prevented except in the case of breastfeeding failure
jaundice. Feedings should start within the first hour of life and continue at least
every 2 or 3 hours, or sooner if the baby shows signs of wanting to eat. The more
premature the baby, the more likely he or she is to need supplements of expressed
milk or formula at first. For all babies, spotting jaundice early and getting treatment
right away are key. This can stop your baby’s bilirubin levels from rising to dangerous
Key points about hyperbilirubinemia in the newborn
- Hyperbilirubinemia happens when there is too much bilirubin in your baby’s blood.
- About 60% of full-term newborns and 80% of premature babies get jaundice.
- The most common symptom is yellowing of your baby’s skin and the whites of his or
- The timing of when your child’s jaundice first starts matters. It can help his or
her healthcare provider make a diagnosis.
- Make sure you feed your baby early and often.
- Spotting jaundice early and getting treatment right away are key. This can stop your
child’s bilirubin from rising to dangerous levels.
Tips to help you get the most from a visit to your child’s healthcare provider:
- The name of the test or procedure
- The reason your child is having the test or procedure
- What results to expect and what they mean
- The risks and benefits of the test or procedure
- When and where your child is to have the test or procedure
- Who will do the procedure and what that person’s qualifications are
- What would happen if your child did not have the test or procedure
- Any alternative tests or procedures to think about
- When and how will you get the results
- Who to call after the test or procedure if you have questions or your child has problems
- How much will you have to pay for the test or procedure