Cephalohematoma is a collection of blood that develops between a newborn's skull bone and the membrane covering it. The condition usually appears as a raised lump on the baby's head after delivery. Most cases resolve naturally, but medical monitoring is important because complications can include jaundice, anemia, and occasionally an underlying skull fracture.
What is a cephalohematoma?
A cephalohematoma forms when small blood vessels rupture during childbirth.
The resulting blood collects beneath the periosteum, a protective membrane covering the skull bone.
Because the blood remains trapped beneath this membrane, the swelling is limited to the surface of one skull bone.
It does not cross the suture lines separating the skull bones.
The collection usually appears over a parietal bone, located toward the upper side or back of the head.
Unlike bleeding inside the skull, a cephalohematoma forms outside the cranial cavity.
The blood collection itself does not press directly on the brain.
However, the delivery forces that caused the swelling can sometimes produce additional injuries requiring evaluation.
Why cephalohematomas develop during childbirth
A baby's head experiences pressure while passing through the birth canal.
In some deliveries, this pressure damages small blood vessels near the skull.
The risk may increase when labor is prolonged or difficult.
Instrument-assisted deliveries are also associated with cephalohematoma.
Vacuum extraction involves suction and traction applied to the baby's head.
Forceps delivery uses instruments to help guide the baby through the birth canal.
Both procedures can be medically appropriate, but they may increase the likelihood of certain head injuries.
Other contributing factors include fetal malposition and difficulty passing the baby's head through the maternal pelvis.
A cephalohematoma does not automatically indicate that childbirth was managed incorrectly.
What does a cephalohematoma look like?
The swelling often develops during the first hours or days after birth.
Parents may notice a rounded lump on one side of the baby's head.
The area may feel firm or slightly soft.
Unlike a surface bruise, a cephalohematoma may not cause noticeable discoloration of the skin.
The swelling can become more prominent before it begins to shrink.
As healing progresses, the outer edge may feel firmer while the center remains softer.
This change can occur during normal blood reabsorption.
However, persistent or unusual swelling should be examined by a healthcare professional.
Possible complications
Most cephalohematomas heal without lasting harm.
One important complication is newborn jaundice.
As the collected blood breaks down, bilirubin enters the bloodstream.
A newborn's developing liver may have difficulty processing the additional bilirubin.
If bilirubin becomes dangerously elevated, treatment may be necessary to prevent neurological injury.
Large cephalohematomas can occasionally contribute to anemia.
Rare complications include infection and calcification.
An underlying skull fracture may also be present in some infants.
How doctors treat cephalohematoma
Observation is the usual treatment.
The baby's body gradually absorbs the trapped blood.
Doctors may monitor the swelling and evaluate bilirubin levels.
If jaundice becomes significant, phototherapy may be recommended.
Routine needle drainage is generally avoided because it can introduce infection.
Imaging may be considered when the examination suggests a fracture or another serious injury.
How long does recovery take?
Many cephalohematomas resolve within several weeks.
Some require up to two or three months to disappear completely.
Recovery depends on the size of the collection and whether complications develop.
A persistent hard lump may require evaluation for calcification.
Parents should follow the child's medical team’s recommendations for monitoring and follow-up.
Common questions around cephalohematoma
Is cephalohematoma dangerous?
Most cases are uncomplicated, but jaundice and other associated conditions require monitoring.
Can a cephalohematoma damage the brain?
The collection itself lies outside the skull and does not directly compress the brain. Associated injuries or severe untreated jaundice can create separate neurological risks.
Will the swelling disappear naturally?
Most cephalohematomas gradually resolve without surgery.
