Jaundice Light Treatment (Phototherapy)
The short answer
Phototherapy (light treatment) is the standard treatment for newborn jaundice when bilirubin levels are too high. Special blue lights help break down bilirubin in the skin so the body can eliminate it. Phototherapy is very safe and effective. Your baby wears only a diaper and eye protection during treatment, which may be done in the hospital or at home with a bili blanket.
Parents everywhere have the same worry. You are doing the right thing by looking into it.
By Age
What to expect by age
Phototherapy is typically needed in the first few days of life when jaundice becomes significant. Your baby will be placed under special blue lights or on a fiber-optic blanket (bili blanket) while wearing eye protection. Common parental concerns include: separation anxiety from baby during treatment, interruption of breastfeeding, and side effects. Side effects are mild and include loose stools, increased fluid needs, and a temporary rash. Breastfeeding should continue during phototherapy; the light treatment does not interfere with feeding. Most babies respond well within 24-48 hours. After treatment, a rebound bilirubin check may be done.
If your baby required phototherapy and jaundice has resolved, there are no lasting effects from the treatment. Bilirubin levels should be monitored if jaundice returns or persists beyond 2 weeks (prolonged jaundice), which may have different causes than typical newborn jaundice.
Phototherapy has no long-term effects on your baby. Development and growth should proceed normally. If your baby had jaundice treated successfully, no ongoing monitoring of bilirubin is needed.
No lasting effects from newborn phototherapy. Your baby should be developing normally in all areas.
What Should You Do?
When to take action
- Baby under phototherapy lights has loose, greenish stools
- Mild rash or skin discoloration during treatment that resolves after
- Baby needs more frequent feeds during phototherapy
- Bilirubin levels decrease with treatment and remain stable after stopping
- You have questions about whether your baby needs phototherapy or how long it will last
- Jaundice appears to return after phototherapy is stopped
- You are interested in home phototherapy options
- Jaundice that is rapidly worsening or your baby appears increasingly yellow despite phototherapy
- Baby becomes lethargic, refuses to feed, has a high-pitched cry, or develops arching of the back, which could indicate dangerously high bilirubin levels
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Medical Concerns
Prolonged Jaundice (Lasting Over 2 Weeks)
Jaundice lasting longer than 2 weeks in a full-term baby or 3 weeks in a premature baby is considered prolonged and should be evaluated. While the most common cause is breast milk jaundice (harmless), prolonged jaundice can occasionally indicate liver or thyroid problems that need prompt treatment. A simple blood test can help determine the cause.
Breast Milk Jaundice
Breast milk jaundice is a harmless condition where substances in breast milk slow the breakdown of bilirubin, keeping the baby mildly jaundiced for up to 2-3 months. It is different from breastfeeding jaundice (caused by insufficient milk intake in the early days). Breast milk jaundice requires no treatment, and you should continue breastfeeding.
ABO Blood Type Incompatibility in Newborns
ABO incompatibility occurs when a mother and baby have different blood types (most commonly a type O mother with a type A or B baby), causing the mother's antibodies to attack the baby's red blood cells. This can lead to more severe jaundice and anemia in the newborn. It is manageable with monitoring and treatment, and the vast majority of babies do well.
My Baby's Head Shape Looks Abnormal
Many babies develop temporary head shape irregularities that are completely normal. A cone-shaped head from vaginal delivery reshapes within days. Mild positional flattening (plagiocephaly) from sleeping on the back is very common and usually improves with repositioning and tummy time. However, head shape changes involving ridges, a persistently bulging fontanelle, or rapid head growth changes should be evaluated to rule out craniosynostosis.
Achondroplasia (Dwarfism) in Babies
Achondroplasia is the most common form of short-limbed dwarfism, affecting about 1 in 15,000 to 40,000 births. It is caused by a mutation in the FGFR3 gene and is usually apparent at birth with characteristic features including short limbs, a larger head, and a prominent forehead. Intelligence is normal. With monitoring for specific complications and supportive care, children with achondroplasia lead full, active, and independent lives.
Adenoid Hypertrophy and Breathing
Adenoids are lymphoid tissue located behind the nose that help fight infection in young children. When adenoids become enlarged (adenoid hypertrophy), they can block the nasal airway, causing chronic mouth breathing, snoring, nasal speech, and sleep-disordered breathing. Enlarged adenoids are most common between ages 2-7 and are a leading cause of obstructive sleep apnea in young children. Treatment ranges from watchful waiting and nasal steroids to surgical removal (adenoidectomy) if breathing or sleep is significantly affected.