Newborn Jaundice and Colic: What New Parents Need to Know

It’s 3 a.m., and your baby has been crying for the third hour in a row. You’ve tried feeding, rocking, changing, and holding them in every position you can think of, but nothing seems to help.

And maybe you’re home from the hospital, still thinking about the yellowish tint you noticed in your newborn’s eyes and wondering whether it’s something to be concerned about.

Both colic and jaundice are common in the earliest weeks of a baby's life, and for new parents especially, they can feel alarming simply because everything is still so unfamiliar.

Knowing a little about what’s behind each one and what a typical pattern looks like can help you feel more confident during those moments. This article covers both conditions, what usually happens, and when it makes sense to check in with a doctor.

What Is Newborn Jaundice and How Long Does It Last?

Jaundice causes yellowing in a baby's skin and eyes, usually appearing within the first few days after birth. It happens because of bilirubin in the blood, a byproduct of red blood cell breakdown that an infant's developing liver can't always process quickly enough in those early days. It's one of the most common things doctors see in newborns, and for the vast majority of families it resolves without any intervention.

For most infants, the yellowing is mild and fades within a week or two. Breastfed infants sometimes take slightly longer, especially when feeds aren’t frequent enough in the early days, since regular nursing helps move bilirubin through the body more efficiently. This is one of the reasons doctors and nurses encourage feeding early and often right from the start.

Jaundice that's intensifying or spreading rather than fading does need medical attention. Your child’s doctor will typically check bilirubin levels shortly after birth and advise whether any follow-up is needed. If the yellow color seems to be getting worse at home, or your baby is becoming unusually difficult to wake for feeds, it’s a good reason to call the doctor rather than wait it out.

What Causes Colic and Why Does It Happen?

Infant colic tends to follow a recognizable pattern even if it doesn't feel that way in the middle of the night. A baby who cries intensely and regularly, for long stretches that seem to have no clear trigger, and who is otherwise healthy and continuing to grow normally, is often described as colicky. The crying typically peaks around six weeks of age and tends to ease significantly by 3 to 4 months, though those weeks in between can feel very long when you're living through them.

No one knows exactly what causes colic, and that uncertainty is genuinely frustrating for parents who want an answer and a fix. The leading ideas involve gas, digestive sensitivity, and a nervous system that is still very much in the process of adjusting to life outside the womb.

Some infants seem to reach a point each day when they’ve simply taken in more stimulation than they can process, and crying becomes their way of letting it out. In other cases, breastfed babies may react to something in their mother’s diet. A mild sensitivity to dairy can sometimes play a role, though this is not the case for every baby.

What matters most is that colic is not a sign that something serious is wrong with your baby. It does not mean you’re missing something, doing something wrong, or that your baby is in danger.

How Is Colic Diagnosed?

There's no specific test for it. A healthcare provider will typically rule out other causes first, looking at feeding patterns, weight, and overall behavior rather than ordering blood tests and x-rays. Colic is really a diagnosis of pattern and exclusion.

Colic symptoms tend to be consistent: crying at roughly the same time each day, often in the late afternoon or evening, a baby who looks uncomfortable during the episode but who feeds and grows well between them. If your baby isn't gaining weight, seems unwell outside of crying periods, or the pattern just doesn't fit, that's worth a conversation with your doctor rather than a wait-and-see approach.

Ways to Soothe a Colicky Baby

Dealing with a baby with colic can be one of the most exhausting challenges for new parents, especially because there is no single approach that works consistently for every infant. What soothes one baby may do little for another, and even a technique that worked yesterday may not work today.

A few things many parents find worth trying:

• Gentle rocking or rhythmic motion during episodes

• Soft white noise or shushing close to the ear

• Keeping your baby upright after feedings to reduce discomfort

• Burping more frequently during and after feeds

• If you're breastfeeding, asking your doctor whether adjusting your diet is worth exploring

One thing is worth saying plainly: when nothing seems to work and you’re exhausted, it’s okay to place your baby in a safe place and step away for a few minutes. Taking a moment to breathe and reset can help you regain your composure. A calm, supported parent is better equipped to care for a crying baby than one who is overwhelmed and exhausted.

When to Call Your Child's Healthcare Provider

Most of the time both conditions are manageable at home with time and patience. That said, there are situations where calling your child's healthcare provider is the right move rather than waiting to see how things develop.

Reach out if:

• Jaundice appears within the first 24 hours of life or becomes more pronounced instead of gradually improving.

• Your baby is unusually difficult to wake for feedings

• Crying episodes last more than three hours, and your baby appears to be in significant distress rather than simply being fussy.

• Weight gain has slowed or stalled

• Something feels off even if you can't quite put your finger on what it is

That last one is worth trusting. Parents often notice subtle changes in their baby before anyone else does. If something feels different or concerning, a same-day virtual visit can help you get answers quickly without having to pack up a newborn for an unnecessary trip to the doctor.

This blog is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your child's doctor or a qualified healthcare provider with any questions you may have regarding a medical condition.