Newborn jaundice is a common condition that causes a baby’s skin and the whites of their eyes to appear yellow. It occurs when bilirubin, a yellow substance produced during the normal breakdown of red blood cells, builds up in the baby’s blood. Although mild jaundice often improves on its own, some babies need medical treatment to reduce their bilirubin levels.
Phototherapy for newborn jaundice is one of the most commonly used treatments when bilirubin levels become high enough to require intervention. It uses a special type of light to help the baby’s body remove bilirubin more effectively.
In this guide, we will explain how phototherapy works, when newborns may need it, its benefits, possible side effects and how parents can support their babies during treatment.
What Is Newborn Jaundice?
Newborn jaundice, also known as neonatal jaundice, develops when bilirubin accumulates in a baby’s blood. A newborn’s liver is still developing and may not be mature enough to remove bilirubin efficiently during the first few days after birth.
Common signs of newborn jaundice include:
- Yellowing of the skin and whites of the eyes.
- Yellow colouring that may spread from the face to the chest, abdomen and legs.
- Dark urine or unusually pale stools in some babies.
- Feeding difficulties or unusual sleepiness when jaundice is more serious.
Jaundice often appears during the first few days of life. However, its severity varies from baby to baby, and a healthcare professional may need to measure bilirubin levels to determine whether treatment is necessary.
What Is Phototherapy for Newborn Jaundice?
Phototherapy for newborn jaundice is a medical treatment that uses a special blue-light source to help reduce bilirubin in a baby’s blood. The light changes bilirubin into forms that the baby’s body can eliminate more easily through urine and stools. This helps lower bilirubin levels and reduces the risk of complications associated with severe jaundice.
Phototherapy may be provided in a hospital, neonatal unit or, for selected babies, at home under a healthcare professional’s supervision. The decision to begin treatment depends on factors such as the baby’s age in hours, bilirubin level, gestational age and other medical risk factors.
How Does Phototherapy Work for Newborn Jaundice?
During phototherapy, the baby is placed under a specially designed light or on a medical light-emitting blanket, depending on the equipment being used.
The process generally involves the following steps:
- Bilirubin assessment: A healthcare professional measures the baby’s bilirubin level using an appropriate test.
- Positioning under the light: The baby is placed under the prescribed phototherapy equipment to expose as much skin as appropriate.
- Eye protection: Protective eye covers are used when required by the equipment and clinical protocol.
- Regular monitoring: Healthcare professionals monitor bilirubin levels, temperature, hydration and feeding.
- Follow-up testing: Repeat bilirubin measurements help determine whether treatment is working and when it can safely stop.
The amount and duration of light exposure are determined by the baby’s clinical condition. Parents should follow the neonatal team’s instructions rather than adjusting the equipment themselves.
When Does a Newborn Need Phototherapy?
Not every baby with jaundice needs phototherapy. Many newborns have mild jaundice that improves as their liver matures. Phototherapy may be recommended when a baby’s bilirubin level reaches the treatment threshold for their age and risk factors.
Doctors may consider phototherapy when:
- Bilirubin levels are rising or are high enough to require treatment.
- The baby was born prematurely or has other risk factors.
- Bilirubin measurements indicate that treatment is needed to prevent complications.
- The baby’s clinical condition requires closer monitoring.
A bilirubin level should not be interpreted in isolation. Healthcare professionals use the baby’s age in hours, gestational age and relevant risk factors to decide whether phototherapy is appropriate.
Types of Phototherapy for Newborn Jaundice
Different phototherapy methods may be used depending on the baby’s bilirubin level, medical needs and available equipment.
1. Conventional Phototherapy
Conventional phototherapy uses a specialised light positioned above the baby’s cot or incubator. The baby usually wears only a nappy to allow suitable skin exposure, with eye protection provided according to the clinical protocol.
2. Intensive Phototherapy
Intensive phototherapy uses a higher effective light dose or additional light sources to reduce bilirubin more rapidly. It may be recommended when bilirubin levels are particularly high or need to be reduced urgently.
3. Fibre-Optic Phototherapy
Fibre-optic phototherapy uses a specialised light-emitting pad or blanket that delivers light to the baby’s skin. It may allow easier handling and feeding in suitable cases.
4. Home Phototherapy
Some babies may be suitable for home phototherapy using approved equipment prescribed by a healthcare professional. This option requires appropriate patient selection, reliable equipment, clear instructions and regular bilirubin monitoring.
Home treatment is not appropriate for every newborn, especially babies who are unwell or have risk factors requiring hospital care.
Benefits of Phototherapy for Newborn Jaundice
Phototherapy is an established treatment for newborns whose bilirubin levels require intervention.
Its main benefits include:
- Reduces bilirubin levels: Helps the baby’s body eliminate excess bilirubin.
- Helps prevent complications: Timely treatment reduces the risk associated with dangerously high bilirubin levels.
- Provides measurable results: Repeat testing helps healthcare professionals assess the baby’s response.
- Offers different treatment options: Suitable babies may receive treatment using overhead lights or fibre-optic equipment.
- Supports safe clinical management: Monitoring allows the healthcare team to adjust treatment according to the baby’s needs.
Early assessment and appropriate treatment are important because severe untreated hyperbilirubinaemia can cause serious neurological complications.
How Long Does Phototherapy Take?
The duration of phototherapy varies depending on the baby’s bilirubin level, age, gestational age and response to treatment. Some babies need treatment for approximately a day or two, while others may require longer treatment or more intensive monitoring.
Healthcare professionals check bilirubin levels during treatment and decide when it is safe to stop. In some cases, bilirubin may rise again after phototherapy ends, so follow-up testing may be recommended.
Parents should not stop treatment early or change the prescribed treatment schedule without medical advice.
Are There Any Side Effects of Phototherapy?
Phototherapy is generally considered safe when provided with appropriate equipment and monitoring. However, some babies may experience temporary effects, including:
- Loose stools.
- Changes in body temperature.
- Increased fluid loss or dehydration.
- Skin changes that require clinical assessment.
- Temporary interruption of normal cuddling or feeding routines, depending on the treatment intensity.
The healthcare team monitors the baby’s temperature, hydration, feeding and bilirubin levels to help manage these concerns.
Parents should tell the medical team if their baby is feeding poorly, has fewer wet nappies or appears unusually sleepy.
How to Care for Your Baby During Phototherapy
Parents play an important role in supporting their newborn during treatment.
- Continue Feeding Regularly
Breastfeeding or formula feeding should continue according to the baby’s individual needs and medical advice. Frequent feeding supports hydration and helps the baby pass stools, which assist bilirubin elimination.
If the baby is too sleepy to feed effectively, ask the healthcare team for guidance.
- Follow Eye-Protection Instructions
Make sure the prescribed eye protection is fitted and used according to the neonatal team’s instructions. Do not remove or adjust it outside the recommended care and feeding breaks without guidance.
- Monitor Wet Nappies and Feeding
Keep track of feeding patterns and wet nappies, and report any concerns to the healthcare professional.
- Attend Follow-Up Appointments
Follow-up bilirubin testing may be necessary during or after treatment. These checks help ensure that bilirubin remains at a safe level.
- Avoid Sunlight as a Substitute
Do not use direct sunlight, window sunlight or ordinary household bulbs as a replacement for medical phototherapy. Sunlight is not a safe, reliable treatment for newborn jaundice.
When Should Parents Seek Urgent Medical Attention?
Jaundice should always be assessed promptly, particularly in the first 24 hours after birth. Seek urgent medical assessment if your newborn develops yellowing of the skin or eyes, especially if it is worsening or accompanied by dark urine or pale stools.
Seek emergency medical care immediately if your baby:
- Is difficult to wake or unusually sleepy.
- Is not feeding or has a significant change in feeding behaviour.
- Has a high-pitched cry, unusual stiffness, floppiness or jerking movements.
- Has a fever, abnormal temperature or breathing difficulties.
- Shows signs of severe illness.
Do not wait for a routine appointment if these warning signs occur.
Conclusion
Phototherapy for newborn jaundice is an effective, established treatment for babies whose bilirubin levels require medical intervention. It uses specialised light to help the body remove excess bilirubin and reduce the risk of serious complications.
Parents should ensure that their newborn receives timely assessment, regular feeding, appropriate monitoring and any recommended follow-up care. If you notice yellowing of your baby’s skin or eyes, contact a healthcare professional rather than trying home remedies.
Frequently Asked Questions
1. Is phototherapy safe for newborn babies?
Phototherapy is an established treatment and is generally safe when administered under appropriate medical supervision. Healthcare professionals monitor the baby’s temperature, hydration and bilirubin levels throughout treatment.
2. Does every newborn with jaundice need phototherapy?
No. Many babies have mild jaundice that resolves without light treatment. Phototherapy is recommended when bilirubin levels reach the appropriate treatment threshold for the baby’s age and clinical risk factors.
3. Can I breastfeed my baby during phototherapy?
In many cases, breastfeeding can continue, with feeding breaks arranged according to the baby’s condition and treatment plan. Babies receiving intensive treatment may need a different feeding arrangement, which the neonatal team will explain.
4. How will doctors know when phototherapy can stop?
Doctors use repeat bilirubin measurements and the baby’s clinical condition to determine when treatment can safely end. Some babies also need follow-up testing after treatment.
5. Can sunlight cure newborn jaundice?
No. Direct sunlight is not a safe or reliable substitute for medical phototherapy. Babies with suspected jaundice should be assessed by a healthcare professional.
6. Can newborn jaundice return after phototherapy?
Bilirubin levels can rise again after treatment stops, which is sometimes called rebound hyperbilirubinaemia. The healthcare team will decide whether repeat testing or follow-up is needed.