Exams and Tests
When to Contact a Medical Professional
Newborn jaundice is when a baby has high levels 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.
High levels of bilirubin makes your baby's skin and whites of the eyes look yellow. This is called jaundice.
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.
It is normal for a baby's bilirubin level to be a bit higher after birth.
When the baby is growing in the mother's womb, the placenta removes bilirubin from the baby's body. The placenta is the organ that grows during pregnancy to feed the baby. After birth, the baby's liver starts doing this job. This can take a while.
Most newborns have some yellowing of the skin, or jaundice. This is called "physiological jaundice." It is harmless, and usually is worst when the baby is 2 - 4 days old. It goes away within 2 weeks and doesn't usually cause a problem.
Two types of jaundice may occur in newborns who are breast fed. Both types are usually harmless.
Breastfeeding jaundice is seen in breastfed babies during the first week of life, especially in babies who do not nurse well or if the mother's milk is slow to come in.
Breast milk jaundice may appear in some healthy, breastfed babies after day 7 of life. It usually peaks during weeks 2 and 3. It may last at low levels for a month or more. It may be due to how substances in the breast milk affect how bilirubin breaks down in the liver. Breast milk jaundice is different than breastfeeding jaundice.
Severe newborn jaundice may occur if your 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
Blood type mismatch between the mother and the baby
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 babies and some twins
Lack (deficiency) 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:
Congenital infections, such as rubella, syphilis, and others
Diseases that affect the liver or biliary tract, such as cystic fibrosis or hepatitis
Low oxygen level (hypoxia)
Infections (such as sepsis)
Many different genetic or inherited disorders
Babies who are born too early (premature) are more likely to develop jaundice than full-term babies.
Jaundice causes a yellow color of the skin. The color sometimes begins on the face and then moves down to the chest, belly area, legs, and soles of the feet.
Sometimes, infants with significant jaundice have extreme tiredness and poor feeding.
Doctors, nurses, and family members will watch for signs of jaundice at the hospital, and after the newborn goes home.
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
Further testing may be needed for babies who need treatment or whose total bilirubin levels are rising more quickly than expected.
Treatment is usually not needed.
When determining treatment, the doctor must consider:
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 now
Your child will need treatment if the bilirubin level is too high or is rising too quickly.
Keep the baby well hydrated with breast milk or formula. Frequent feedings (up to 12 times a day) encourage frequent bowel movements, which help remove bilirubin through the stools. Ask your doctor before giving your newborn extra formula.
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. This is called phototherapy. These lights work by helping to break down bilirubin in the skin.
The infant is placed under artificial light in a warm, enclosed bed to maintain constant temperature. The baby will wear only a diaper and special eye shades to protect the eyes. The American Academy of Pediatrics recommends that breastfeeding be continued through phototherapy, if possible. Rarely, the baby may have 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 levels.
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. Treating severely jaundiced babies with intravenous immunoglobulin may also be very effective at reducing bilirubin levels.
Usually newborn jaundice is not harmful. For most babies, jaundice usually gets better without treatment within 1 to 2 weeks.
Very high levels of bilirubin can damage the brain. This is called kernicterus. However, the condition is almost always diagnosed before levels become high enough to cause this damage.
For babies who need treatment, the treatment is usually effective.
Rare, but serious, complications from high bilirubin levels include:
Kernicterus -- brain damage from very high bilirubin levels
All babies should be seen by a health care provider in the first 5 days of life to check for jaundice.
Those who spend less than 24 hours in a hospital should be seen by age 72 hours.
Infants sent home between 24 and 48 hours should be seen again by age 96 hours.
Infants 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 term, otherwise healthy newborns. Call the infant's health care 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
In newborns, some degree of jaundice is normal and probably not preventable. The risk of significant 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 cord is recommended. This may also be done if the mother's blood type is O+, but it is not needed if careful monitoring takes place.
Careful monitoring of all babies during the first 5 days of life can prevent most complications of jaundice. Ideally, 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