Last Updated: June 02, 2026
TL;DR: A newborn’s skull is naturally soft and flexible to facilitate childbirth and rapid brain growth. While a misshapen head is usually a harmless result of birth pressure or spending extended periods resting in one position (positional plagiocephaly), minor adjustments can fix it. By prioritizing daily tummy time and alternating their head position during sleep, you can naturally encourage a beautifully rounded shape without compromising safe sleep protocols.
You may not have realized this until you were in the delivery room, but a lot of babies aren’t born with a round head.
This happens because newborns’ heads are made out of soft, flexible bones with spaces between them.
During birth, these bones are able to squeeze together to change the shape of your baby’s head to make it easier for it to fit through the birth canal.
This is a temporary condition that should resolve on its own in a few days. It’s not harmful, though it may have been alarming if you weren’t expecting it.
While addressing structural quirks like head shape is a normal part of early parenting, keeping your infant thriving involves a complete, proactive care routine. For a comprehensive roadmap on managing sleep, feedings, and daily wellness, check out our mega guide on how to ensure your newborn stays healthy.
In this article, we’re going to go over the types of birth injuries that can cause cranial molding in infants and what your baby’s skull goes through during the birth process.
Birth Injuries That Can Cause a Misshapen Head
The following conditions are two of the most common reasons newborns are born with oddly shaped heads. In most cases, these conditions will resolve on their own.
Caput Succedaneum
Caput succedaneum is a condition that occurs when fluid collects between your baby’s scalp and their skull.
It usually looks like a puffy, swollen area on the top or side of a newborn’s head, and in some cases, the baby may also have a bruise on their head or face.
Caput succedaneum can be caused by the normal trauma a baby’s body goes through as it’s being squeezed through the birth canal.
It can also be caused by a doctor’s mistake. You can learn more about the caput succedaneum causes here.
If caput succedaneum is the reason behind your baby’s misshapen head, you can expect it to go away in a few days.
Cephalohematoma
A cephalohematoma happens when blood collects or a blood clot forms between your baby’s scalp and their skull.
This is also caused by pressure while passing through the birth canal and birth injuries, but it usually does not cause bruising.
If you see a solid bump on your baby’s head, it might be a cephalohematoma.
This bump can appear at birth, but it also may not be visible until days later. This condition also usually clears up on its own, though it may take days or even weeks for it to do so.
| Read also: Types of Birth Defects and Their Causes |
Why Your Newborn’s Head Is Not Round
A baby’s body goes through a lot on its way through the birth canal. Even when everything goes smoothly, the baby will be squeezed, and the part of the head that presents first can be damaged from the pressure.
When something goes wrong, babies can end up with head injuries, broken bones, and brain damage.
If your baby’s head isn’t round, it does not mean the infant has sustained brain damage. It may simply be the normal result of long labor that resulted in a vaginal delivery.
Damage to a baby’s brain is not something you can see from the outside, though conditions that cause a baby’s head to be misshapen can also be associated with other factors that do cause brain damage.
This may be the case if your baby was guided through the birth canal through the use of forceps or vacuum extraction.
The use of these instruments during delivery can save an infant’s life. They can also cause the baby to be born with an oddly shaped head.
In cases where the doctor applies excessive force, these instruments can also cause brain damage.
If your baby is born with a misshapen head, your doctor will evaluate the baby at the hospital to make sure there are no associated conditions.
In most cases, before you know it, your baby will have the round head you were expecting.
Frequently Asked Questions
Will a Misshapen Baby Head Fix itself Over Time?
Yes, most minor head shape irregularities improve naturally as your baby grows, gains neck strength, and begins rolling over independently around 4 to 6 months of age. According to pediatric guidelines from the American Academy of Pediatrics (AAP), consistent repositioning techniques and daily tummy time are highly effective at correcting flat spots without medical intervention. If the asymmetry persists past 6 months, a pediatrician should evaluate your child for specialized therapeutic options.
What is the Difference Between Plagiocephaly and Craniosynostosis?
Positional plagiocephaly is a benign structural shaping issue caused by external pressure on the soft skull bones, often resulting from a preferred sleeping position. Craniosynostosis is a rare, serious congenital condition where the skull sutures fuse prematurely, restricting normal brain development and requiring surgical correction. A clinical assessment by a pediatrician or pediatric neurosurgeon can accurately differentiate between the two via physical examination or imaging.
How Many Minutes of Tummy Time Does a Newborn Need to Prevent Flat Spots?
The Centers for Disease Control and Prevention (CDC) recommends starting tummy time early in infancy with short, 2-to-3-minute sessions, 2 to 3 times per day. As your baby develops stronger neck and shoulder muscles, gradually increase the duration until they are accumulating at least 15 to 30 minutes total daily. This practice removes direct hydrostatic pressure from the back of the skull, actively preventing and correcting positional flat spots.
Is it Safe to Use Baby Head Shaping Pillows to Correct an Uneven Skull?
No, the use of baby head shaping pillows, sleep positioners, or any soft bedding is strictly unsafe and is warned against by major health regulatory bodies. The U.S. Food and Drug Administration (FDA) has issued explicit safety warnings stating that these products pose severe suffocation and Sudden Infant Death Syndrome (SIDS) risks. To preserve safe infant sleep standards, always place your baby on a flat, firm, unobstructed mattress surface without supplemental pillows.
When Should I be Worried about My Baby’s Uneven Head Shape?
You should consult your pediatrician if your infant’s head shape looks noticeably asymmetrical after 4 to 6 months, or if you observe a distinct lack of neck mobility. Clinical warning signs include a rigid, uneven ridge along the skull lines, an ear that appears pushed forward on one side, or an inability to turn the head comfortably in both directions. Early medical evaluations ensure timely access to physical therapy or corrective helmet molding therapy if required.
About The Author:
Carla Smith is the founder of SafeandHealthyLife.com. Her main objective is to provide informative articles, reviews, and analysis of health & fitness topics to her readers that help them make their lives easier and happier. Connect with her on Twitter.
