Newborn Jaundice



Jaundice is a yellow coloring in your baby’s skin, and sometimes, the whites of the eyes. Newborn jaundice happens during the first weeks of life. There are many types of jaundice, including:

  • Physiologic jaundice
  • Breastfeeding jaundice
  • Breast milk jaundice (human milk jaundice syndrome)
  • Jaundice caused by hemolysis or increased bilirubin production
  • Jaundice caused by inadequate liver function (due to inborn errors of metabolism, prematurity, or enzyme deficiencies)
Baby with Jaundice
Jaundice Baby
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The yellow coloring is caused by bilirubin. Bilirubin is a waste product. It is created when red blood cells are broken down. Bilirubin normally passes out of the body through feces or urine. Jaundice occurs when there is an abnormal buildup of bilirubin. Different types of jaundice have different reasons for the abnormal buildup of bilirubin:

  • Physiologic jaundice:
    • May be caused by the breakdown of fetal red blood cells.
    • The baby’s body does not get rid of bilirubin very efficiently in the first days of life.
  • Breastfeeding jaundice:
    • Occurs in about 13% of breastfed babies.
    • This type of jaundice is caused by dehydration and poor calorie intake. It may happen in babies that are not taking in enough breast milk.
  • Breast milk jaundice:
    • Occurs in only 2% of babies.
    • It may be caused by a substance in breast milk that blocks the elimination of bilirubin.
  • Hemolysis:
    • Caused by massive breakdown of red blood cells
    • May be caused by mismatched blood types in mom and baby such as Rh disease
    • This type of jaundice will occur within the first 24 hours of life. It occurs before the baby leaves the hospital and can be harmful
  • Inadequate liver function:
    • The liver may be impaired by an infection or liver disease.
    • This type of jaundice usually happens before the baby leaves the hospital.

Risk Factors

Newborn jaundice is more common in children of East Asian, Mediterranean, or Native American descent.

Factors that may increase your baby’s chance newborn jaundice include:

  • Prematurity—babies born before 36 weeks of pregnancy
  • Brother or sister treated for jaundice
  • Baby has a different blood type than mother, resulting in hemolysis
  • Poor feeding with breast or bottle
  • Large bruises or a condition called cephalhematoma (bleeding under the scalp related to labor and delivery)
  • High bilirubin levels or signs of jaundice in the first 24 hours of life (before leaving the hospital)
  • Certain liver enzyme deficiencies
  • Infection



The main symptom of jaundice is yellow skin color. The color usually starts in the face. The yellow color may then spread down to the stomach and legs. Certain environments may make your baby appear yellow. To look for yellow skin, place your baby near a window or in a room with fluorescent light. If you are still unsure, press gently on the baby’s forehead or chest. Watch as the color reappears.

When to Call the Doctor

Call your baby's doctor if you suspect your baby has jaundice.

If your baby has been diagnosed with jaundice, call your doctor if:

  • Yellow color gets deeper
  • Yellow color spreads to other parts of the body or the eyes
  • Jaundice lasts for more than 3 weeks

Very high levels of bilirubin in your baby’s blood can be dangerous. It can lead to a very rare form of brain damage called kernicterus. It is important to see a doctor if your baby has signs of this condition. Call the doctor immediately if your baby:

  • Is tired all the time or difficult to wake
  • Sucks or nurses poorly
  • Looks weak or floppy
  • Arches his or her back or neck backwards
  • Develops a high-pitched cry or fever
  • Has convulsions or spasms


The American Academy of Pediatrics recommends that all babies are assessed for jaundice before they leave the hospital. Your baby will be checked again at 3-5 days of age. If your doctor suspects jaundice, you will be asked about your baby’s symptoms and medical history. A physical exam will be done.

Tests may include:

  • Examination of baby’s skin
  • Transcutaneous bilirubin (TcB)—a light is passed through the baby's skin to screen for high bilirubin levels
  • Blood test—to check level of bilirubin in blood. This may be done if TcB shows a risk for high bilirubin levels



Most babies with jaundice will not need treatment. Jaundice in formula-fed infants will usually clear up in 2 weeks. In breastfed babies, jaundice usually clears up in 2-3 weeks.

If treatment is needed, talk with the doctor about the best treatment plan. Treatment options include:

Change in Feedings

Increased breastfeeding can help clear bilirubin from a baby's body. 8-12 feedings will be needed per 24-hour period. Do not let the baby sleep for more than 4 hours without feeding during this time period. If breastfeeding is a problem, ask your doctor or lactation specialist for help.

Babies that are formula-fed will need to get extra formula. Ask the doctor for guidelines as to how much formula should be provided. The baby may need to be given 1-2 ounces (30-60 milliliters) of formula every 2-3 hours.

For most jaundice, extra breastfeeding is helpful. However, breast milk jaundice is caused by the breast milk. the doctor may recommend stopping breastfeeding for a couple days. This will let the bilirubin decrease. Once the jaundice has cleared, it is safe to resume breastfeeding.


Phototherapy is the use of special lights. The lights help alter the bilirubin in the blood. The bilirubin can then easily pass in the urine or through the gastrointestinal tract.

the baby will be placed naked, or wearing only a small diaper, under special blue or white lights. A shield will help to protect the baby's eyes. Phototherapy may be done at home or in the hospital.

These light are specially designed to treat the bilirubin without harming your baby's skin. Putting your baby in the direct sunlight is NOT recommended. Direct sunlight on a naked baby can cause dangerous sunburn.

Exchange Transfusion

In the most severe cases of jaundice, your doctor may recommend a blood transfusion. A transfusion will replace your baby’s blood with new blood. The excess bilirubin will be removed with the blood.


There are no current guidelines to prevent newborn jaundice.

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.

Edits to original content made by Denver Health.

a (Hyperbilirubinemia)


Healthy Children—American Academy of Pediatrics 

March of Dimes 


Health Canada 

Public Health Agency of Canada 


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