Last updated: October 2026
Newborn jaundice is a yellow tint in a baby’s skin and eyes caused by a buildup of bilirubin. It is very common, usually shows up on day 2 or 3, and most of the time it fades on its own within two weeks. The time to worry is when yellow color appears in the first 24 hours, spreads down to the belly and legs, or comes with poor feeding or a baby who is hard to wake. Those signs mean call your pediatrician the same day.
If you are staring at your sleeping baby under the kitchen light trying to decide if that glow is “a little yellow” or “too yellow,” you are not alone. Nearly every parent in Marietta, Alpharetta, and Cumming has done the same thing in the first week home. Here is how to tell the difference.
Key takeaways
- About 60% of all babies get some jaundice. For most, it is harmless and temporary.
- Bilirubin usually peaks between day 3 and day 5, then falls.
- Call now for jaundice in the first 24 hours, yellow legs or feet, poor feeding, or a baby who will not wake to eat.
- Every baby should have a bilirubin check before leaving the hospital and a follow-up visit within 1 to 2 days of discharge.
What is newborn jaundice and why do so many babies get it?
Jaundice happens because a newborn’s liver needs a few days to get good at clearing bilirubin, a yellow pigment left over when red blood cells break down. About 60% of all babies have jaundice, which makes it one of the most common things a pediatrician sees in the first week of life. [Source: CDC 2023]
Before birth, the mother’s liver did this job for the baby. After birth, the baby’s own liver takes over, and it takes a little time to catch up. This normal, short-lived version is called physiologic jaundice. It is not a sign that anything went wrong during pregnancy or delivery.
Some babies are more likely to have higher bilirubin levels. The list includes babies born before 37 weeks, babies with heavy bruising from delivery, babies who are not feeding well in the first days, and babies with an older sibling who needed light therapy. [Source: HealthyChildren.org 2022] Your pediatrician weighs these factors when deciding how soon to recheck.
How is jaundice checked in a newborn?
Jaundice is measured with a bilirubin test, not by eye. The AAP’s 2022 clinical practice guideline recommends measuring bilirubin on every newborn before hospital discharge, either with a light meter on the skin or with a small heel-stick blood sample. [Source: HealthyChildren.org 2022]
The skin meter is quick and painless. If the reading is high, the team usually confirms it with a blood test, which is the most accurate measure. The result is compared to a chart based on your baby’s exact age in hours and risk factors. That comparison, not the number alone, tells the pediatrician whether treatment is needed and when to check again.
Looking at skin color is a starting point, not a diagnosis. Yellow is harder to see on babies with darker skin, so checking the gums, the inner lips, and the whites of the eyes helps. [Source: CDC 2023] If you are unsure, a quick video visit can help a pediatrician decide whether your baby needs an in-person bilirubin check.
Newborn jaundice timeline: what is normal by day of life?
Normal jaundice appears around day 2 to 4, peaks between day 3 and 5, and fades within two weeks. Jaundice that shows up in the first 24 hours, or that is still rising after the newborn visit, is outside the normal pattern and needs a call. [Source: MedlinePlus 2023]
| Baby’s age | What is typical | What needs a call |
|---|---|---|
| First 24 hours | No visible yellow | Any yellow skin or eyes. Bilirubin should be measured right away. |
| Day 2 to 4 | Yellow tint starts on the face and may reach the chest | Yellow spreading to the belly, arms, or legs; poor feeding; hard to wake |
| Day 3 to 5 | Bilirubin usually peaks, then starts to fall | Color getting deeper each day instead of lighter |
| Week 2 | Formula-fed babies are usually clear | Formula-fed baby still yellow after 2 weeks |
| Weeks 2 to 4 | Breastfed babies may stay faintly yellow | Breastfed baby still yellow after 4 weeks, or pale stools or dark urine at any point |
Timing matters because of where the yellow color goes. Jaundice usually starts on the face and moves down to the chest, belly, arms, and legs as bilirubin rises. [Source: HealthyChildren.org 2022] A baby who is yellow only in the face is in a very different place than a baby with yellow feet.
Does breastfeeding cause jaundice?
Breastfeeding does not cause jaundice, but it is linked to two mild, common patterns. The first happens in the first week when a baby is not yet taking in enough milk. The second, called breast milk jaundice, starts after day 7, peaks in weeks 2 and 3, and can linger at low levels for a month or more. [Source: MedlinePlus 2023]
The fix for the first pattern is more milk, not less breastfeeding. Feeding at least 8 to 12 times a day in the first few days helps bring in your supply and helps bilirubin leave the body in stool. [Source: HealthyChildren.org 2022] If you are wondering whether your baby is eating often enough, our guide on how often a newborn should eat walks through what to expect.
Breast milk jaundice is usually harmless and almost always clears on its own. In most cases breastfeeding can and should continue. [Source: CDC 2024] Your pediatrician may suggest a temporary top-up with pumped milk or formula if levels are climbing, but that is a case-by-case decision. Wet diapers are your best home gauge of intake, so keep a rough count of wet diapers in the first week.
What is phototherapy for jaundice?
Phototherapy means placing your baby, wearing only a diaper and soft eye shields, under special blue lights that help the body break down bilirubin through the skin. The lights do not hurt, and hospital treatment usually lasts 1 to 2 days. [Source: MedlinePlus 2023]
Think of it as speeding up a process the body is already doing. The light changes bilirubin into a form that passes out in urine and stool. You can still hold, feed, and change your baby during breaks, and breastfeeding should continue. When levels are only mildly high, some babies are treated at home with a fiber-optic light blanket while a nurse checks in daily.
One thing to skip: sunlight. Putting a baby near a window is not a safe or recommended way to treat jaundice, and it risks sunburn and overheating. [Source: CDC 2023] Very high levels that do not respond to lights are rare and are managed in the hospital.
Newborn jaundice: when to worry and call the pediatrician now
Call the same day, or go to the emergency department after hours, if your baby is yellow in the first 24 hours, the color is spreading to the legs and feet, your baby is feeding poorly, or your baby is hard to wake. Untreated very high bilirubin can, in rare cases, cause a type of brain damage called kernicterus, and early treatment prevents it. [Source: CDC 2023]
Here is the short list to keep on the fridge:
- Yellow in the first 24 hours. This is never considered routine and needs a bilirubin test right away.
- Yellow belly, legs, or feet. Color moving down the body means bilirubin is rising.
- Poor feeding. Refusing the breast or bottle for more than 2 feedings in a row, or fewer than 4 to 6 wet diapers a day by day 4.
- Hard to wake, limp, or very fussy. A sleepy baby who will not rouse to eat needs to be seen.
- High-pitched cry, arched back, or stiff body. These are emergency signs. Call 911 or go to the nearest ER.
- Still yellow at 2 weeks (formula-fed) or 4 weeks (breastfed). Not an emergency, but your pediatrician should check for other causes.
Poor feeding and jaundice feed each other. A baby who is not eating well makes less stool, so bilirubin builds up, which makes the baby sleepier and less interested in eating. That loop is why we also watch closely for signs of dehydration in babies during the first week.
What happens at the newborn visit for jaundice?
The first office visit is where most jaundice questions get answered. Babies discharged before 48 hours of age should be seen within 2 days, and the team will weigh your baby, look at feeding, and recheck bilirubin if needed. [Source: HealthyChildren.org 2022]
At a newborn visit, expect a few things. The pediatrician reviews the bilirubin number from the hospital, your baby’s age in hours, and any risk factors. Your baby is weighed to see how much of the birth weight has been regained. The team asks about feeding, wet diapers, and stools. If the skin check or history raises a flag, a bilirubin level is repeated in the office. You can read more about what to bring and what to expect in our guide to the first pediatrician visit.
Bring the hospital discharge paperwork, including the last bilirubin reading and the time it was drawn. That single number saves a lot of guesswork.
How a pediatrician can help with jaundice in North Atlanta
A pediatrician’s job in the first week is to catch rising bilirubin before it becomes a problem, and to reassure you when it is not one. Every physician at our four North Atlanta offices is board certified and cares for children from birth through age 18, so your baby’s jaundice check happens at the same place as every visit that follows. The CDC advises that babies sent home before 72 hours of age be seen within 2 days of discharge, which is why newborn appointment slots are held open every day. [Source: CDC 2023]
If something looks off at 7 a.m. on a Tuesday, same-day sick visits are available every day at all four offices in Marietta, East Cobb, Alpharetta, and Cumming. A bilirubin recheck is a quick visit, and it is far better to come in and hear “this is normal” than to wait and wonder. We also offer a Saturday clinic, which matters when a baby is discharged on a Friday and the follow-up window lands on the weekend.
Babies born in late summer in Cobb and Forsyth County face one extra wrinkle: Georgia heat. A warm house and a sleepy baby can mask poor feeding, so keep up the feeding schedule and diaper count even on the hottest days. If you are new to the practice, our new patient page explains how to get your newborn set up before you leave the hospital.
Frequently asked questions about newborn jaundice
Can I treat newborn jaundice at home with sunlight?
No. Placing your baby in a sunny window is not a safe or effective treatment, and it can cause sunburn or overheating. Phototherapy lights are a specific wavelength and intensity that sunlight through glass does not match. The things you can do at home are simple: feed often, at least 8 to 12 times a day in the first days, track wet diapers, and watch the color. If your pediatrician decides your baby needs light treatment and the level is only mildly high, home phototherapy with a light blanket may be an option, with a nurse checking in daily. That is prescribed and monitored, not improvised.
How long does newborn jaundice last?
For most formula-fed babies, jaundice clears within about 2 weeks. Breastfed babies often stay faintly yellow for about a month, and sometimes a little longer, because of breast milk jaundice. That pattern is usually harmless as long as the baby is feeding well, gaining weight, and having normal stools. Call your pediatrician if a formula-fed baby is still yellow at 2 weeks or a breastfed baby is still yellow at 4 weeks. Also call at any age if stools turn pale or chalky or urine is dark, since those point to something other than routine jaundice.
Is jaundice more common in breastfed babies?
Yes, jaundice is somewhat more common in breastfed babies, mostly because milk supply takes a few days to come in and some babies do not latch well at first. Less milk means less stool, and stool is how bilirubin leaves the body. The answer is almost never to stop breastfeeding. More frequent feeds, help from a lactation consultant, and sometimes a short-term top-up with pumped milk or formula are the usual tools. Your pediatrician will decide based on the bilirubin number, your baby’s age in hours, and how feeding is going.
Does jaundice mean my baby’s liver is damaged?
Almost never. Routine newborn jaundice is a timing issue: the liver is healthy but still ramping up. The bilirubin test, not the skin color, tells the pediatrician whether the level is in the expected range for your baby’s age. Jaundice that lasts beyond 2 to 4 weeks, pale stools, dark urine, or jaundice that appeared in the first 24 hours are the situations that prompt a closer look at the liver and other causes. Those are uncommon, and catching them early is exactly why the newborn visit is scheduled so soon after discharge.
The bottom line on newborn jaundice
A little yellow on day 3 is normal and expected. Yellow on day 1, yellow legs, a baby who will not wake to eat, or jaundice that keeps deepening are the signs that mean call now. If you are unsure, do not wait it out. A quick bilirubin check at the newborn visit or a same-day appointment settles the question. Request an appointment at any of our four North Atlanta offices and let us take a look.
This article is for general information and is not medical advice. Contact your pediatrician for care specific to your child.
