Cephalohematoma vs Caput Succedaneum

If you just met your baby and immediately thought, Why does their head look like that? you are in very good company. In the clinic and in the newborn nursery, scalp swelling after delivery is one of the most common, totally understandable panic triggers.

The reassuring news: most “birth bumps” are harmless and fade on their own. The key is figuring out which kind you are seeing, because the timeline and follow-up can be different.

The most common birth-related head swellings

Two terms get tossed around a lot after a vaginal delivery (and sometimes after a long labor or assisted delivery):

• Caput succedaneum: swelling in the scalp’s soft tissue, basically a puffy bruise-like swelling from pressure during birth.
• Cephalohematoma: a collection of blood under the periosteum (a tough layer covering the skull bone), caused by small blood vessels breaking during delivery.

They can look similar at first glance, so let’s break them down in plain English.

Caput succedaneum

What it is

Caput succedaneum is swelling of the scalp tissue. Think of it as “puffiness” from pressure as your baby’s head squeezed through the birth canal.

What it looks and feels like

• Soft and squishy, sometimes with bruising.
• Often looks like a generalized puffy area on the top or back of the head.
• May be noticeable right at birth.

Does it cross suture lines?

Yes. Caput is in the scalp soft tissue, so it can spread across the natural seams between skull bones (the sutures).

How long it lasts

Caput usually improves over 1 to 3 days and typically resolves over the first few days.

Cephalohematoma

What it is

Cephalohematoma is bleeding under a tough layer covering the skull bone (the periosteum). Because that layer is tightly attached to each individual skull bone, the swelling stays contained.

What it looks and feels like

• More firm or rubbery than caput.
• Well-defined edges, like a bump with boundaries.
• Usually appears over the parietal bone (the side/top area of the head).
• Can be subtle at birth and become more noticeable over the first 24 to 72 hours.

Does it cross suture lines?

No. This is the classic test question. A cephalohematoma is limited to a single skull bone, so it does not cross suture lines.

How long it lasts

Cephalohematomas take longer to reabsorb. Many improve over weeks, and some can take up to a couple of months to fully resolve. As the blood breaks down, the bump may feel harder temporarily and sometimes looks like it has a “ridge” as it shrinks. That can be a normal part of healing.

Quick comparison

Bruising and jaundice

Any bruising means there are red blood cells breaking down, and that process produces bilirubin. Newborns already have a lot of bilirubin to process in the first week of life, so extra bruising or a cephalohematoma can increase the chance of noticeable jaundice.

When a head bump raises jaundice questions

You do not need to panic, but you should be a little more watchful if your baby has:

• A large cephalohematoma
• Significant scalp bruising from delivery
• Early jaundice in the first 24 hours
• Feeding challenges (less intake can worsen jaundice)

What parents can watch for at home

• Yellowing of the skin or whites of the eyes, starting on the face and moving down the body.
• Sleepiness that makes it hard to wake for feeds.
• Poor feeding or fewer wet diapers than expected.

If you are concerned, call your baby’s clinician. Sometimes the right answer is simply a bilirubin check and a feeding plan.

Not the same as subgaleal hemorrhage

There is a third (less common) type of newborn scalp bleeding called a subgaleal hemorrhage. It is important because it can spread widely under the scalp and, in rare cases, a baby can lose a significant amount of blood into that space.

Unlike a cephalohematoma, a subgaleal hemorrhage can:

• Cross suture lines
• Feel very boggy or “wave-like”
• Expand quickly and spread over a large area of the scalp (sometimes toward the ears or back of the head)

If your baby has rapidly increasing, diffuse scalp swelling or seems unwell (pale, very sleepy, weak cry, fast breathing), that needs urgent medical evaluation.

Subgaleal hemorrhage is more often associated with vacuum-assisted delivery (and sometimes forceps), which is one reason clinicians may watch head swelling and jaundice more closely after assisted births.

What you should not do

• Do not massage the bump. It will not “move the fluid out,” and it can irritate tender tissue.
• Do not apply compression bandages unless your pediatrician specifically instructs you to.
• Do not attempt to drain it. Cephalohematomas are not drained at home, and even in medical settings drainage is generally avoided due to infection risk.
• Do not assume it is flat head syndrome from positioning. Birth-related swellings are different from later head-shape changes.

When to call the pediatrician

Most caput and cephalohematomas are “watch and wait” situations, but there are a few red flags that deserve prompt evaluation.

Call within 24 hours if:

• The bump seems to be getting larger after you are home.
• Your baby develops increasing yellowing or looks more jaundiced than yesterday.
• Your baby is not feeding well, has fewer wet diapers, or is too sleepy to eat.
• The swelling is still clearly present and unchanged beyond the expected timeline (caput beyond several days, or a cephalohematoma that is not gradually improving over weeks).
• The bump is becoming very hard and not shrinking over time (rarely, cephalohematomas can calcify). This is usually not an emergency, but it is worth discussing at well visits.

Seek urgent care now (or emergency care) if:

• Your baby is difficult to wake, unusually limp, or has weak crying.
• There are breathing problems, color changes (blue/gray), or repeated vomiting.
• You notice seizure-like movements.
• The scalp skin looks infected (spreading redness, warmth, drainage, fever).
• The bump is rapidly enlarging, very boggy, and spreading over the scalp (a pattern that can be concerning for subgaleal hemorrhage).
• The bump is accompanied by significant head trauma after birth (a fall), or you suspect injury.

If something feels off, you are not overreacting. You are parenting.

Safe sleep note

Always place your baby on their back for sleep. The bump itself is outside the brain and typically does not change safe sleep recommendations.

One small practical note: in the hospital, babies sometimes wear caps for warmth. At home, most safe sleep guidance recommends skipping hats during sleep to reduce overheating, unless your clinician specifically tells you otherwise.

Different from flat spots or craniosynostosis

Parents often end up on late-night Google paths that jump from “newborn head bump” to craniosynostosis or severe skull problems in about 30 seconds. Let’s put that in the right box.

• Caput and cephalohematoma are temporary swellings related to the birth process. They improve over days to weeks.
• Positional plagiocephaly (flat head) is a shape change that develops over time from pressure on one spot, usually in the weeks after birth.
• Craniosynostosis involves skull sutures closing too early and causes a more persistent, progressive head-shape pattern. It is not a soft, squishy newborn swelling.

If your baby’s head shape looks increasingly uneven over time, bring it up at well visits. But a birth bump in the first days of life is most often one of the common delivery-related swellings above.

What healing looks like

If it is caput

• Most noticeable right after birth
• Improves over 1 to 3 days
• Usually gone within a few days

If it is cephalohematoma

• May become more obvious over the first 1 to 3 days
• Can feel firmer before it feels better
• Slowly shrinks over weeks
• May leave temporary discoloration as bruising resolves

If you want a practical tip: take one photo in consistent lighting every few days. It is surprisingly hard to judge gradual changes when you are sleep-deprived, and photos can help you and your pediatrician see the trend.

Frequently asked questions

Does a cephalohematoma mean my baby has a skull fracture?

Usually, no. Most cephalohematomas occur without any serious injury. That said, in some cases a clinician may consider imaging based on the delivery history, the exam, and how your baby is acting.

Will it affect my baby’s brain?

Caput and cephalohematoma are outside the skull. They can look dramatic, but they are not the same as bleeding inside the brain.

Should I put ice on it?

Skip ice unless your baby’s clinician specifically advises it. Newborn skin and temperature regulation are delicate, and ice can cause more harm than benefit.

The bottom line

Caput succedaneum is a soft swelling that can cross suture lines and usually resolves in days. Cephalohematoma is a firmer, more defined bump that does not cross suture lines and can take weeks to months to fade.

If there is significant bruising or a cephalohematoma, it is smart to keep jaundice on your radar and follow your newborn’s recommended checkups. And if your baby is not feeding well, seems unusually sleepy, the swelling is rapidly enlarging, or anything just feels wrong, get your pediatric team involved.

You do not need to diagnose this perfectly at 3 AM. You just need a plan: watch the trend, feed the baby, and call when something does not match the expected course.