You bring your baby home, and within a day or two you notice something: the skin looks a little yellow. The whites of the eyes seem tinged. Your instinct says something is not right — but everyone around you says it is normal. They are probably correct. But "probably" is not reassuring when it is your newborn. Neonatal jaundice — yellowing of the skin and eyes in newborns — is the most common condition requiring medical attention in the first week of life, affecting between 60 and 80% of all babies born at full term, and an even higher proportion of premature infants. In most cases it resolves on its own within two to three weeks. In some cases, it does not — and the consequences of missing that distinction are serious. Here is everything you need to know as a parent.

What Causes Jaundice in Newborns?

The cause is a substance called bilirubin — a yellow pigment produced when red blood cells break down. In adults and older children, the liver processes bilirubin efficiently. In newborns, the liver is immature and cannot keep up with the volume of bilirubin being produced, particularly in the first few days after birth when red blood cell turnover is at its highest. Bilirubin accumulates in the blood and deposits in the skin and eye tissue, causing the characteristic yellow tinge.

Most Common Causes of Jaundice in Babies

Physiological jaundice — the most common type. It is a normal, expected consequence of the newborn's immature liver. It typically appears between day 2 and day 4 of life, peaks around day 4–5, and resolves by 2 weeks in full-term babies (up to 3 weeks in premature infants). Breastfeeding jaundice — occurs in the first week when a baby is not feeding frequently or effectively enough, leading to mild dehydration and reduced bilirubin excretion through stool. More feeds = more stool = faster bilirubin clearance. Breast milk jaundice — a less common, distinct condition where certain substances in breast milk interfere with bilirubin processing. It appears in the second week and can persist for 3–12 weeks, but is almost always harmless and not a reason to stop breastfeeding. Blood group incompatibility (ABO or Rh incompatibility) — when the mother's and baby's blood groups are incompatible, maternal antibodies can cross the placenta and cause accelerated breakdown of the baby's red blood cells, producing excess bilirubin. This is a more serious form and often appears within 24 hours of birth. Prematurity — premature babies are at higher risk because their liver is even less mature. Jaundice in premature babies tends to be more severe and longer-lasting. Other causes — include infection, enzyme deficiencies (such as G6PD deficiency, which is notably common in India), internal bleeding (cephalhaematoma), and rarely, liver or bile duct abnormalities.

Symptoms of Neonatal Jaundice: What to Look For

The most visible sign is newborn yellow skin — a yellowing that typically starts at the face and moves downward to the chest, abdomen, and legs as bilirubin levels rise. In darker-skinned babies, jaundice may be easier to see by pressing gently on the skin and looking for the underlying colour. Signs of neonatal jaundice symptoms to monitor:

• Yellow skin — starting from the face, spreading downward
• Yellow tinge in the whites of the eyes (sclera)
• Baby appears sleepy and difficult to wake for feeds
• Poor feeding or weak suckling
• High-pitched cry (a warning sign — see below)
• Dark-coloured urine (should be pale/colourless in newborns)
• Pale or chalky stools (suggests bile duct problem — seek immediate attention)

A practical test: In natural light (not yellow indoor lighting, which can mask or exaggerate colour), press a fingertip gently on the tip of the nose or forehead. If the skin appears yellow when you release, jaundice is present.

Types of Jaundice: Physiological vs Pathological

Feature	Physiological Jaundice	Pathological Jaundice
When it appears	Day 2–4 after birth	Within first 24 hours of birth
Cause	Immature liver	Blood incompatibility, infection, G6PD deficiency
Severity	Usually mild	Can be severe and rapidly rising
Duration	Resolves by 2 weeks	Requires active treatment
Treatment needed	Rarely (monitoring, feeding support)	Often requires phototherapy or more

Key rule of thumb: Jaundice appearing within 24 hours of birth is pathological until proven otherwise. Always requires immediate medical evaluation.

Newborn Jaundice Treatment: How Is It Managed?

Treatment depends on the baby's bilirubin levels (measured by a blood test or a transcutaneous bilirubinometer), gestational age, and age in days.

Feeding Support

For mild jaundice, the first intervention is increasing feeding frequency — at least 8–12 feeds per day for breastfed babies. Frequent feeding increases gut motility, which accelerates bilirubin excretion through stool. This alone resolves the majority of physiological jaundice cases.

Phototherapy for Jaundice

Phototherapy is the standard medical treatment when bilirubin levels cross a threshold. The baby is placed under blue-spectrum lights (wavelength 400–520 nm) that convert bilirubin in the skin into a water-soluble form that can be excreted through urine and bile — without going through the liver. The baby's eyes are covered during treatment to protect the retinas. Phototherapy is safe, effective, and typically reduces bilirubin levels within 24–48 hours. The 2022 updated AAP guidelines refined thresholds for initiating phototherapy, reducing unnecessary overtreatment while ensuring babies at genuine risk are treated promptly. Short-term side effects — skin rashes, mild dehydration, and temperature changes — are manageable with good nursing care and frequent feeding.

Exchange Transfusion

Reserved for severe cases where bilirubin levels are dangerously high despite phototherapy, or where the rate of rise is very rapid. The baby's blood is slowly replaced with donor blood to rapidly reduce bilirubin. This is a hospital-based procedure and is now rarely required with timely phototherapy intervention.

When Neonatal Jaundice Becomes Serious: Kernicterus

This is the section every parent needs to read carefully. When bilirubin levels rise to an extreme level and cross the blood-brain barrier, they can damage brain cells — a condition called kernicterus (also called bilirubin encephalopathy). Kernicterus is preventable with timely treatment. Once it occurs, the damage is permanent. Warning signs that require immediate emergency medical attention:

• Jaundice appearing within the first 24 hours of life
• Jaundice that is spreading rapidly to the legs and soles of the feet
• Baby is extremely difficult to wake or appears limp
• High-pitched, unusual crying
• Baby arches the back or neck (opisthotonus)
• Seizures

If your baby shows any of these signs, go to the nearest hospital immediately — do not wait for a scheduled appointment.

When to See a Doctor for Newborn Jaundice

You should consult a doctor — not just wait and watch — if:

• Jaundice appears within the first 24 hours of birth
• Jaundice has not faded by 2 weeks (in full-term babies) or 3 weeks (in premature babies)
• Bilirubin levels are not falling with feeding and monitoring
• Your baby is feeding poorly, difficult to wake, or unusually irritable
• You notice the danger signs listed above

Do not rely on visual assessment alone for treatment decisions. Bilirubin levels must be measured — either through a blood test or a non-invasive skin meter — to guide management.

Neonatal Care in Malad West, Mumbai

Dr. Shernaz Damkevala (Dastur) provides dedicated neonatal care for newborns and their families at Ahura Nursing Home, Malad West — including assessment and management of neonatal jaundice, feeding support, and post-discharge monitoring for babies at risk of prolonged or recurrent jaundice. If you are currently pregnant and have a blood group incompatibility or a previous baby with significant jaundice, a pre-birth discussion can help you understand the plan for your newborn from day one. Explore maternity care services for comprehensive antenatal and postnatal support. For parents whose baby spent time in the NICU, understand the different levels of neonatal care and what follow-up looks like after discharge. 📍 P4, Ahura Nursing Home, Chunilal Giridharilal Marg, Malad West, Mumbai – 400064 📞 Book an Appointment Also read: Gynaecology Services | Fertility Care | PCOS/PMOS Management

FAQs 

Q1. Is jaundice in newborns normal?

A: Yes, in most cases. Physiological jaundice affects 60–80% of newborns and resolves within 2 weeks. However, jaundice appearing within 24 hours of birth, or worsening rapidly, is not normal and requires immediate evaluation.

Q2. What causes neonatal jaundice?

A: The primary cause is an immature liver that cannot process bilirubin fast enough. Other causes include blood group incompatibility, breastfeeding-related issues, G6PD enzyme deficiency, and infection.

Q3. When does newborn jaundice appear and how long does it last?

A: Physiological jaundice typically appears on day 2–4 and resolves by 2 weeks in full-term babies. In premature babies, it may last up to 3 weeks. Jaundice appearing within 24 hours is a warning sign.

Q4. What is the treatment for jaundice in newborns?

A: Mild jaundice is managed with frequent feeding. When bilirubin levels are elevated, phototherapy (blue-spectrum light treatment) is used to break down bilirubin safely. Severe cases may require exchange transfusion.

Q5. What is phototherapy for newborn jaundice?

A: Phototherapy exposes the baby's skin to blue-spectrum light that converts bilirubin into a form the body can excrete through urine and bile. It is safe, effective, and the standard first-line treatment for elevated bilirubin.

Q6. What is kernicterus?

A: Kernicterus is brain damage caused by extremely high bilirubin levels that cross the blood-brain barrier. It is preventable with timely treatment but permanent once it occurs. Early intervention is critical.

Q7. Does breastfeeding cause jaundice?

A: Infrequent or ineffective breastfeeding in the first week can worsen physiological jaundice. Breast milk jaundice — a separate condition — can cause mild, prolonged jaundice into the second or third week but is generally harmless and not a reason to stop breastfeeding.

Q8. Should I stop breastfeeding if my baby has jaundice?

A: In most cases, no. Stopping breastfeeding is rarely necessary and is generally not recommended. Increasing feeding frequency is usually more beneficial. Always consult your doctor before making any change.

Q9. What are the danger signs of jaundice in newborns?

A: Emergency signs include jaundice within 24 hours of birth, extreme sleepiness or limpness, high-pitched crying, arching of the back or neck, and seizures. These require immediate hospital attention.

CITATIONS & REFERENCES

1. American Academy of Pediatrics — Clinical Practice Guideline Revision: Management of Hyperbilirubinemia in the Newborn Infant 35 or More Weeks of Gestation (2022) — https://publications.aap.org/pediatrics/article/150/3/e2022058859/188726/ 
2. Mayo Clinic Health System — Newborn Jaundice and Light Therapy (updated May 2026) — https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/newborn-jaundice-and-light-therapy
3. Kumar VS et al. — Impact of the 2022 AAP Hyperbilirubinemia Guideline on Phototherapy Utilization in a Resource-Limited Setting in India — Cureus, November 2025 — https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12742236/
4. Dong Q, Huang F — Optimizing Nursing Care in Phototherapy to Improve Treatment Outcomes in Neonatal Jaundice Management — Frontiers in Pediatrics, December 2025 — https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12753984/
5. PACE Hospitals — Phototherapy Treatment for Newborn Jaundice — https://www.pacehospital.com/phototherapy-for-newborn-jaundice
6. WHO — Newborn health: Jaundice — https://www.who.int/news-room/fact-sheets/detail/newborns-reducing-mortality