Newborn jaundice
Newborn jaundice is not harmful most of the time. For most babies, jaundice will get better without treatment within 1 to 2 weeks.
Jaundice in Newborns
Babies with jaundice have a yellow coloring of the skin and eyes. This happens when there is too much bilirubin in the baby’s blood.
Bilirubin (bill-uh-ROO-bin) is a yellow substance that comes from the normal breakdown of red blood cells. The liver removes bilirubin from the blood and passes it into the bowels so it can leave the body.
A newborn baby’s liver does not remove bilirubin as well as an adult’s does. Jaundice (JON-diss) happens when bilirubin builds up faster than the liver can break it down and pass it from the body.
Most types of jaundice go away on their own. Others need treatment to lower bilirubin levels.
What Are the Signs and Symptoms of Jaundice?
A baby with jaundice has skin that looks yellow. It starts on the face, then the chest and stomach, and then the legs. The whites of a baby’s eyes also look yellow. Babies with very high bilirubin levels may be sleepy, fussy, floppy, or have trouble feeding.
Jaundice may be hard to see, especially in babies with dark skin. If you’re unsure, gently press the skin on your baby’s nose or forehead. If it’s jaundice, the skin will appear yellow when you lift your finger.
Call the doctor if your baby:
- starts to look or act sick
- is not feeding well
- is sleepier than usual
- has jaundice that gets worse
What Causes Jaundice in Newborns?
Many healthy newborns have physiological (“normal”) jaundice. This happens because newborns have more blood cells than adults do. These blood cells don’t live as long, so more bilirubin is made when they break down. This kind of jaundice appears 2–4 days after the baby is born and goes away by the time a baby is 2 weeks old.
Babies can get jaundice if they:
- are born early. Premature babies are even less ready to remove bilirubin. They also can have problems at lower bilirubin levels than babies born later. Doctors treat them sooner.
- don’t get enough breast milk. This often happens in the first few weeks of life, because a mother’s milk isn’t in yet or the baby has trouble breastfeeding. If a baby has this type of jaundice (called breastfeeding jaundice), it’s best to feed more often as it can lower the risk of jaundice. A breastfeeding (lactation) consultant can help.
- are breastfed. In some babies, breast milk prevents the liver from quickly removing bilirubin. This is called breast milk jaundice and happens after the first week of life. Bilirubin levels slowly improve over 3–12 weeks. Experts don’t know why this happens in some babies, but it could be due to a protein that doesn’t let bilirubin be cleared from the body or might be linked to genetics. Either way, it is only temporary.
- has a different blood type from the mother. If mother and baby have different blood types, the mother’s body makes antibodies that attack the baby’s red blood cells. This can happen if:
- the mother’s blood type is O and the baby’s blood type is A or B (called ABO incompatibility)
- the mother’s Rh factor (a protein found on red blood cells) is negative and the baby is Rh positive
How Is Jaundice Diagnosed?
Doctors can tell if a baby has jaundice based on a yellowing of the skin and whites of the eyes. All newborns are checked for jaundice before leaving the hospital or birth center.
Babies with jaundice will get a blood test to check bilirubin levels. Sometimes, a light machine that measures bilirubin in the skin is used. But if the level is high, a blood test must confirm the result.
High bilirubin levels can lead to serious problems. So doctors carefully watch babies with jaundice.
How Is Jaundice Treated?
Treatment depends on the cause of the jaundice, the bilirubin levels, and a baby’s age.
Mild jaundice goes away after 1 or 2 weeks as a baby’s body gets rid of the extra bilirubin on its own. For newborns with breastfeeding jaundice, mothers should breastfeed the baby more often. If the baby is not getting enough breast milk, the doctor may suggest supplementing with formula.
For more serious cases of jaundice, treatment should start as soon as possible. Babies may get:
- fluids. A loss of fluids (dehydration) will cause bilirubin levels to rise.
- phototherapy. Babies lie under lights with little clothing so their skin is exposed. The light changes the bilirubin to a form that can easily pass out of the body. Light-therapy blankets may also be used.
- exchange blood transfusion. This emergency procedure is done if very high bilirubin levels do not come down with phototherapy. The baby’s blood is replaced with blood from a donor to quickly lower bilirubin levels.
- intravenous immunoglobulin (IVIg). Babies with blood type incompatibilities get this through an IV (into a vein). IVIg blocks antibodies that attack red blood cells and reduces the need for an exchange transfusion.
What Else Should I Know?
Call the doctor if your baby has jaundice that isn’t going away. Babies with jaundice for longer than 2 weeks need more testing to check for other things that cause jaundice. These include infections, and problems with the liver or bile system, metabolism, or genes.
Newborn jaundice
Newborn jaundice occurs when a baby has a high level of bilirubin in the blood. Bilirubin is a yellow substance that the body creates when it replaces old red blood cells. The liver helps break down the substance so it can be removed from the body in the stool. A high level of bilirubin makes a baby’s skin and whites of the eyes look yellow. This is called jaundice.
Antibodies from an Rh negative mother may enter the blood stream of her unborn Rh positive infant, damaging the red blood cells (RBCs). The infant responds by increasing RBC production and sending out immature RBCs that still have nuclei. This photograph shows normal RBCs, damaged RBCs, and immature RBCs that still contain nuclei.
Newborn jaundice (producing yellow skin) can have many causes, but the majority of these infants have a condition called physiological jaundice, a natural occurrence in the newborn due to the immature liver. This type of jaundice is short term, generally lasting only a few days. Jaundice should be evaluated by a physician until decreasing or normal levels of bilirubin are measured in the blood.
Using bili lights is a therapeutic procedure performed on newborn or premature infants to reduce elevated levels of bilirubin. If blood levels of bilirubin become too high, the bilirubin begins to dissolve in the body tissues, producing the characteristic yellow eyes and skin of jaundice. Bilirubin also has an affinity for brain tissue, where it can accumulate and cause permanent brain damage.
Jaundice is a yellow discoloring of the skin, mucous membranes, and eyes, caused by too much bilirubin (a breakdown product of hemoglobin made by the liver) in the blood. Jaundice is a condition produced when excess amounts of bilirubin circulating in the blood stream dissolve in the subcutaneous fat (the layer of fat just beneath the skin), causing a yellowish appearance of the skin and the whites of the eyes.
Causes
- Breastfeeding jaundice is seen in breastfed babies during the first week of life. It is more likely to occur when babies do not nurse well or the mother’s milk is slow to come, leading to dehydration.
- Breast milk jaundice may appear in some healthy, breastfed babies after day 7 of life. It is likely to peak during weeks 2 and 3, but may last at low levels for a month or more. The problem may be due to how substances in the breast milk affect the breakdown of bilirubin in the liver. Breast milk jaundice is different from breastfeeding jaundice.
Severe newborn jaundice may occur if the baby has a condition that increases the number of red blood cells that need to be replaced in the body, such as:
- Abnormal blood cell shapes (such as sickle cell anemia)
- Blood type mismatch between the mother and baby (Rh incompatibility or ABO incompatibility)
- Bleeding underneath the scalp (cephalohematoma) caused by a difficult delivery
- Higher levels of red blood cells, which is more common in small-for-gestational age (SGA) babies and some twins
- Infection
- Lack of certain important proteins, called enzymes
Things that make it harder for the baby’s body to remove bilirubin may also lead to more severe jaundice, including:
- Certain medicines
- Infections present at birth, such as rubella, syphilis, and others
- Diseases that affect the liver or biliary tract, such as cystic fibrosis or hepatitis
- Low blood oxygen level (hypoxia)
- Infections (sepsis)
- Many different genetic or inherited disorders
Babies who are born too early (premature) are more likely to develop jaundice than full-term babies.
Symptoms
Jaundice causes a yellow color of the skin. It usually begins on the face and then moves down to the chest, belly area, legs, and soles of the feet.
Sometimes, infants with severe jaundice may be very tired and feed poorly.
Exams and Tests
Health care providers will watch for signs of jaundice at the hospital. After the newborn goes home, family members will usually spot the jaundice.
Any infant who appears jaundiced should have bilirubin levels measured right away. This can be done with a blood test.
Many hospitals check total bilirubin levels on all babies at about 24 hours of age. Hospitals use probes that can estimate the bilirubin level just by touching the skin. High readings need to be confirmed with blood tests.
Tests that will likely be done include:
- Complete blood count
- Coombs test
- Reticulocyte count
Further testing may be needed for babies who need treatment or whose total bilirubin level is rising more quickly than expected.
Treatment
Treatment is not needed most of the time.
When treatment is needed, the type will depend on:
- The baby’s bilirubin level
- How fast the level has been rising
- Whether the baby was born early (babies born early are more likely to be treated at lower bilirubin levels)
- How old the baby is
A baby will need treatment if the bilirubin level is too high or is rising too quickly.
A baby with jaundice needs to take in plenty of fluids with breast milk or formula:
- Feed the baby often (up to 12 times a day) to encourage frequent bowel movements. These help remove bilirubin through the stools. Ask your provider before giving your newborn extra formula.
- In rare cases, a baby may receive extra fluids by IV.
Some newborns need to be treated before they leave the hospital. Others may need to go back to the hospital when they are a few days old. Treatment in the hospital usually lasts 1 to 2 days.
Sometimes, special blue lights are used on infants whose levels are very high. These lights work by helping to break down bilirubin in the skin. This is called phototherapy.
- The infant is placed under these lights in a warm, enclosed bed to maintain a constant temperature.
- The baby will wear only a diaper and special eye shades to protect the eyes.
- Breastfeeding should be continued during phototherapy, if possible.
- In rare cases, the baby may need an intravenous (IV) line to deliver fluids.
If the bilirubin level is not too high or is not rising quickly, you can do phototherapy at home with a fiberoptic blanket, which has tiny bright lights in it. You may also use a bed that shines light up from the mattress.
- You must keep the light therapy on your child’s skin and feed your child every 2 to 3 hours (10 to 12 times a day).
- A nurse will come to your home to teach you how to use the blanket or bed, and to check on your child.
- The nurse will return daily to check your child’s weight, feedings, skin, and bilirubin level.
- You will be asked to count the number of wet and dirty diapers.
In the most severe cases of jaundice, an exchange transfusion is required. In this procedure, the baby’s blood is replaced with fresh blood. Giving intravenous immunoglobulin to babies who have severe jaundice may also be effective in reducing bilirubin levels.
Outlook (Prognosis)
Newborn jaundice is not harmful most of the time. For most babies, jaundice will get better without treatment within 1 to 2 weeks.
A very high level of bilirubin can damage the brain. This is called kernicterus. The condition is almost always diagnosed before the level becomes high enough to cause this damage. Treatment is usually effective.
Possible Complications
Rare, but serious complications from high bilirubin levels include:
- Cerebral palsy
- Deafness
- Kernicterus, which is brain damage from very high bilirubin levels
When to Contact a Medical Professional
All babies should be seen by a provider in the first 5 days of life to check for jaundice:
- Infants who spend less than 24 hours in a hospital should be seen by age 72 hours.
- Infants who are sent home between 24 and 48 hours should be seen again by age 96 hours.
- Infants who are sent home between 48 and 72 hours should be seen again by age 120 hours.
Jaundice is an emergency if the baby has a fever, has become listless, or is not feeding well. Jaundice may be dangerous in high-risk newborns.
Jaundice is generally not dangerous in babies who were born full term and who do not have other medical problems. Contact the infant’s provider if:
- Jaundice is severe (the skin is bright yellow)
- Jaundice continues to increase after the newborn visit, lasts longer than 2 weeks, or other symptoms develop
- The feet, especially the soles, are yellow
Talk with your baby’s provider if you have questions.
Prevention
In newborns, some degree of jaundice is normal and probably not preventable. The risk for serious jaundice can often be reduced by feeding babies at least 8 to 12 times a day for the first several days and by carefully identifying infants at highest risk.
All pregnant women should be tested for blood type and unusual antibodies. If the mother is Rh negative, follow-up testing on the infant’s umbilical cord is recommended. This may also be done if the mother’s blood type is O positive.
Careful monitoring of all babies during the first 5 days of life can prevent most complications of jaundice. This includes:
- Considering a baby’s risk for jaundice
- Checking bilirubin level in the first day or so
- Scheduling at least one follow-up visit the first week of life for babies sent home from the hospital in 72 hours
References
Kaplan M, Wong RJ, Burgis JC, Sibley E, Stevenson DK. Neonatal jaundice and liver diseases. In: Martin RJ, Fanaroff AA, Walsh MC, eds. Fanaroff and Martin’s Neonatal-Perinatal Medicine: Diseases of the Fetus and Infant. 11th ed. Philadelphia, PA: Elsevier; 2020:chap 91.
Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM. Digestive system disorders. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 123.
Rozance PJ, Wright CJ. The neonate. In: Landon MB, Galan HL, Jauniaux ERM, et al, eds. Gabbe’s Obstetrics: Normal and Problem Pregnancies. 8th ed. Philadelphia, PA: Elsevier; 2021:chap 23.
Version Info
Last reviewed on: 1/24/2023
Reviewed by: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Internal review and update on 02/03/2024 by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
