Most newborn jaundice is harmless and fades on its own. In rare cases, though, bilirubin climbs too high and is not caught or treated in time, and the result can be a permanent brain injury called kernicterus. This article explains how to tell the two apart: the signs of jaundice in babies that parents can watch for, how bilirubin levels in newborns are checked, what hospitals and pediatricians are generally expected to do, and when a missed or delayed diagnosis may point to medical negligence.

Neonatal jaundice is very common. According to StatPearls, a peer-reviewed medical reference indexed by the National Library of Medicine, approximately 60% of term newborns and 80% of preterm newborns develop jaundice in the first week after birth. In most of those babies it is a mild, temporary condition known as physiologic jaundice. The concern is the smaller group of babies whose bilirubin keeps rising, because dangerous levels can generally be prevented when the rise is recognized and treated in time.

What Causes Jaundice in Newborns?

Jaundice is the yellow color that shows up in a baby’s skin and the whites of the eyes when there is too much bilirubin in the blood. Bilirubin is a yellow pigment made when the body breaks down old red blood cells. Adults clear it easily through the liver, but newborns are born with extra red blood cells that break down quickly, and their livers are still maturing. As a result, bilirubin tends to build up during the first days of life.

In a healthy full-term baby, this rise is expected and usually short-lived. A CDC report has noted that in full-term newborns, serum bilirubin levels generally peak at 48 to 72 hours of age. That timing matters because many babies go home from the hospital around 24 to 48 hours after birth, which means the highest bilirubin levels often occur after discharge. This is one reason follow-up visits in the first few days are so important.

Some babies are more likely than others to develop high bilirubin. Babies born before 40 weeks face a higher risk, and the risk generally increases the earlier a baby is born. Jaundice that shows up in the first 24 hours of life is another important warning sign, because it often means red blood cells are breaking down faster than normal.

That faster breakdown can happen when the mother’s and baby’s blood types are incompatible (ABO or Rh incompatibility), or when a baby has an inherited condition such as G6PD deficiency. Significant bruising or a cephalohematoma, which is a collection of blood under the scalp sometimes seen after a vacuum-assisted delivery or forceps delivery, can also add to the bilirubin load as that blood is broken down. Feeding difficulties, significant weight loss in the first days, and a sibling who needed jaundice treatment are other recognized risk factors.

None of these factors means a baby will develop dangerous jaundice. They do, however, signal that the care team should be monitoring bilirubin more closely.

Signs of Jaundice in Babies: When Is It Not Normal?

The color of a baby’s skin alone is not a reliable measure of how high bilirubin is, especially in babies with darker skin tones. That is why a blood test or a skin-meter reading is generally needed to know the actual level. Still, parents are often the first to notice that something is changing at home, and certain signs call for prompt medical attention.

Contact your baby’s doctor right away, or seek emergency care, if you notice:

• Yellow color that appears within the first 24 hours after birth
• Yellowing that spreads to the belly, arms, or legs, or that seems to be getting deeper
• A baby who is unusually sleepy, hard to wake, or too drowsy to feed
• Poor feeding, fewer wet or dirty diapers than expected, or dark urine
• A high-pitched cry that is hard to settle
• Arching of the neck or back, stiffness, or unusual floppiness
• Jaundice that is still present at two weeks of age in a formula-fed baby, or at three to four weeks in a breastfed baby

The later signs on this list, such as a high-pitched cry, arching, and extreme sleepiness, can mean that bilirubin has begun to affect the brain. Doctors call this acute bilirubin encephalopathy, and it is the stage at which kernicterus symptoms first appear. This is a medical emergency. Prompt treatment may still limit lasting harm, so parents should not wait for a scheduled appointment if these signs appear.

What Hospitals and Pediatricians Are Generally Expected to Do

The American Academy of Pediatrics (AAP) publishes the national clinical practice guideline on newborn jaundice for babies born at 35 weeks or later. Its most recent revision was published in Pediatrics in August 2022. The guideline is not a law, but it is widely used as a reference point for what reasonable newborn care looks like.

The guideline starts with monitoring in the hospital. All infants should be visually assessed for jaundice at least every 12 hours after delivery until discharge, and a bilirubin level should be measured as soon as possible for any baby who looks jaundiced in the first 24 hours. In addition, every baby should have a bilirubin level measured, with either a skin meter or a blood test, between 24 and 48 hours after birth, or before discharge if that occurs earlier. Reviewers of the update have explained that this universal screening reflects the view that visual inspection alone is too inaccurate to judge the level of jaundice.

Treatment decisions are based on a blood test called total serum bilirubin. Doctors are also expected to weigh risk factors such as gestational age, early jaundice, signs of red blood cell breakdown, and how quickly bilirubin is rising. When bilirubin reaches the treatment threshold, the standard newborn jaundice treatment is phototherapy, a special blue light that changes bilirubin into a form the body can remove more easily. If levels keep climbing toward the point where an exchange transfusion may be needed, a procedure that gradually replaces the baby’s blood with donor blood, the guideline calls for escalating care and rechecking bilirubin frequently.

The guideline also addresses what happens after a baby goes home. The timing of the first follow-up check is generally based on how close the baby’s last bilirubin level was to the treatment threshold. Hospital protocols based on the guideline note that discharge may be delayed when timely follow-up cannot be arranged.

Finally, the guideline stresses educating families. All families should receive written and verbal education about newborn jaundice before discharge. In announcing the update, the guideline’s lead author said the goal was to help clinicians and hospitals “prevent the worst-case scenarios” and to help families know when to follow up with their pediatrician.

What Is Kernicterus? Symptoms and Long-Term Effects

Kernicterus is permanent brain damage caused by very high bilirubin. When bilirubin rises far enough, it can cross from the blood into the brain and injure areas that control movement, hearing, and eye movement. A CDC report describes kernicterus as a preventable life-long neurologic syndrome caused by severe and untreated hyperbilirubinemia in the newborn period.

Doctors often describe this injury in two stages. The first is acute bilirubin encephalopathy, the short-term illness that can appear in the first days or weeks of life. Signs can include extreme sleepiness, poor feeding, a high-pitched cry, arching of the neck and back, fever, and seizures. If bilirubin is brought down quickly at this stage, some babies may avoid lasting injury.

The second stage is chronic bilirubin encephalopathy, the long-term damage that remains once the brain has been injured. According to the same CDC report, its features can include a form of cerebral palsy, hearing loss, and problems with eye movement. Children with kernicterus may have:

• A movement disorder, often a form of cerebral palsy marked by involuntary, writhing movements
• Hearing loss or auditory neuropathy, which can delay speech and language
• Trouble moving the eyes, especially looking upward
• Poorly formed enamel on the baby teeth
• Feeding difficulties, reflux, and in some cases seizures

There is no cure for kernicterus once it develops. Treatment focuses on therapies and support, such as physical, occupational, and speech therapy, hearing aids or cochlear implants, and medication to manage muscle tone. Because the brain damage is permanent, many children need care throughout their lives. That is why the steps taken in the first days and weeks of life, when the condition can still be prevented, matter so much.

When Is Kernicterus Medical Malpractice?

Not every case of severe jaundice involves a medical mistake. Some babies have underlying conditions that cause bilirubin to rise very quickly, and many are diagnosed and treated exactly as they should be. However, because the tools to detect and treat high bilirubin are simple and widely available, kernicterus often raises the question of whether something was missed along the way. The CDC report on kernicterus states that treating hyperbilirubinemia with phototherapy and exchange transfusions prevents kernicterus if treatment is started promptly and continued until bilirubin levels normalize.

In a medical malpractice claim, the central question is generally whether the doctors, nurses, or hospital met the accepted standard of care, and whether a failure to do so caused the child’s injury. In kernicterus medical malpractice cases, the concern is often a failure to diagnose or treat jaundice in time. Situations that may raise questions include:

• No bilirubin measurement before discharge, or reliance on how the baby “looked” instead of a test
• Jaundice in the first 24 hours that was not tested or investigated
• Known risk factors, such as prematurity, blood type incompatibility, or significant bruising, that were not documented or acted on
• A bilirubin result near or above the treatment threshold that was not recognized or plotted correctly
• Discharge without a timely follow-up appointment, or without clear jaundice instructions for parents
• Delays in starting phototherapy, rechecking levels, or escalating care when bilirubin kept rising
• Parents’ calls about a yellow, sleepy, or poorly feeding baby that were dismissed or not escalated

Whether any of these amounts to negligence depends on the specific facts, the medical records, and the opinions of qualified medical experts. Bilirubin charts, nursing notes, discharge paperwork, and pediatric office records are generally central to that review. Families who have concerns may find it helpful to request copies of these records early and to review our guide on what to do if you suspect medical malpractice. For more on how these claims work in the newborn setting, see our page on medical malpractice in neonatal care.

Filing a Kernicterus Lawsuit in Indiana: Timing Matters

The effects of kernicterus are not always obvious right away. Hearing loss may not be confirmed until a child is slow to speak, and movement problems may become clearer as a baby misses motor milestones. Some families do not learn the cause of their child’s condition until months or years after birth.

Indiana’s Medical Malpractice Act sets specific filing deadlines. Under Indiana Code § 34-18-7-1, a claim generally must be filed within two years of the alleged malpractice, except that a minor less than six years of age has until the minor’s eighth birthday to file. For injuries that happen at birth, this often means the child’s claim must be filed before the eighth birthday. Parents’ own claims, such as claims for medical expenses they paid, may be subject to a shorter deadline, so it is important not to assume the eighth-birthday rule covers every claim. Our article on Indiana’s eighth-birthday rule explains this deadline in more detail.

Indiana malpractice claims also generally go through a medical review panel process before a case can proceed in court, which adds time. Because gathering records and expert reviews takes time as well, families who have questions about a child’s jaundice care may benefit from speaking with an attorney well before any deadline approaches.

Frequently Asked Questions

When is newborn jaundice dangerous?

Most newborn jaundice is mild and goes away without treatment. It becomes dangerous when bilirubin rises to very high levels and is not treated in time, which can lead to brain injury.

What bilirubin level is dangerous for a newborn?

There is no single number. Treatment thresholds depend on the baby’s age in hours, gestational age, and risk factors. A level that is fine for a four-day-old full-term baby may call for treatment in a baby who is one day old or born early. This is why doctors plot each result against the AAP’s age-specific thresholds.

Can kernicterus be prevented?

Kernicterus can generally be prevented through bilirubin screening, timely follow-up, and prompt treatment with phototherapy or, when needed, an exchange transfusion.

Is kernicterus reversible?

No. Once bilirubin has caused permanent brain damage, the injury cannot be undone. Therapies, hearing devices, and medications can help children manage symptoms and improve function.

My baby was sent home with jaundice and later needed treatment. Does that mean something went wrong?

Not necessarily. Many babies are appropriately sent home with mild jaundice and a follow-up plan, and some later need phototherapy. Whether the care was appropriate generally depends on the bilirubin results, risk factors, follow-up timing, and how the care team responded to changes.

How long do I have to file a kernicterus lawsuit in Indiana?

For a child injured before age six, Indiana law generally allows a malpractice claim to be filed until the child’s eighth birthday. A shorter deadline may apply to parents’ own claims, so it is best to seek legal advice early.

Questions About Your Child’s Jaundice Care?

If your child was diagnosed with kernicterus, bilirubin-related hearing loss, or cerebral palsy after newborn jaundice, you may have questions about whether the care your baby received met accepted standards. If you are considering a kernicterus claim, the Indiana birth injury lawyers at Powless Law can review your situation in a free evaluation. You can also learn more on our birth injury page.