What is flat head syndrome in babies?
Flat head syndrome, or positional plagiocephaly, is a benign deformation of a baby's skull, often linked to prolonged positions on the back. It's common in the first few months and, with a few simple actions, it can often be prevented or corrected.
Good news: in the vast majority of cases, this skull asymmetry is reversible. With a few simple daily actions, some prevention, and if necessary, medical support, you can help your baby regain a nice head shape :)
Understanding flat head syndrome
What is plagiocephaly?
Plagiocephaly is a somewhat daunting word to describe an asymmetrically flattened skull, often behind one ear. Sometimes it's also referred to as brachycephaly when the flattening is symmetrical at the back of the head. These deformations are often grouped under the term positional plagiocephaly syndrome.
It usually appears between 4 and 12 weeks, at a time when infants still spend a lot of time lying down, in a supine position.
Why can an infant's head flatten?
Because the bones of their skull are still malleable. As the brain grows quickly, the skull must adapt. But if the baby often stays in the same position, pressure is always exerted in the same place. Result: the skull flattens. A bit like modeling clay left too long on a table.
This constant pressure can come from prolonged contact with the mattress, the bed, or certain non-suitable pillows, often used outside of supervised sleep.
Some babies are more at risk:
- Those with congenital torticollis (difficulty turning the head both ways)
- Premature babies
- Very calm babies, who move little
Daily prevention
The best treatment is often... prevention. Here are the simple actions to adopt from the first days:
- Vary sleeping positions: always on the back to sleep, but regularly turn the head from one side to the other.
- Alternate arms when bottle-feeding or breastfeeding to engage different neck muscles.
- Use a play mat several times a day, on the back and on the tummy.
- Do tummy time as soon as the baby is awake and supervised. A few minutes are enough at first.
- Minimize time in bouncers, swings, car seats, especially during car trips. It's practical, but it exerts constant pressure on the back of the infant's head.
- Observe their mobility: do they turn their head well to both sides?
- And for outings, prefer walks in a baby carrier, wrap, or sling. Babywearing frees the head from any pressure!
Babywearing: a natural solution to adopt
Why does babywearing help?
Because it allows the baby to be in an upright position, without pressure on the skull. Carried against you, the baby is contained, reassured, rocked... and their little skull develops freely.
Physiological babywearing also helps to:
- improve cervical muscle tone
- relieve certain tensions (especially related to infant torticollis)
- Stimulate sensory and motor development
- Reduce crying (which is also a bit of prevention... for your own head!)
What type of baby carrier to choose?
- Wrap: ideal from birth, adjustable
- Sling: no knot, quick to install
- Physiological baby carrier: versatile, practical, and respectful of the natural position
Tips for carrying your baby well
- Keep the baby against you, head at kiss height
- Ensure the head is supported without being blocked (with a wrap panel or a headrest)
- Alternate positions (front, hip, back depending on age).
- Turn the baby's head every 30 minutes if they don't do it themselves
When to consult a professional?
Signs that should alert you
Some signs may justify a consultation with a pediatrician, a pediatric physiotherapist, or an osteopath trained in perinatal care:
- If the flattening of the skull persists beyond 3 months.
- Facial asymmetry
- In case of visible facial asymmetry.
- If one side of the forehead is more advanced than the other.
- When the ear on the flattened side seems misaligned or more delayed.
- If the head shows abnormal growth in profile view (for example, elongation).
- If the head appears abnormally wide compared to normal.
A professional can check for congenital torticollis, a postural problem, or propose appropriate management. Misuse of a child's pillow, or a bed that is too inclined, can also exacerbate pressures on the skull and require an adjustment of sleeping habits.
Medical or orthopedic treatment
The orthopedic helmet
In some cases, a flat head helmet may be prescribed by a specialist. It is a custom-made helmet, worn for several hours a day, which helps guide the growth of the skull.
👉 This treatment is mainly considered between 5 and 10 months, when other solutions have not been sufficient. It requires good medical follow-up and the commitment of the parents (and the baby!).
The role of physiotherapy
Pediatric physiotherapy can be very useful, especially if there is torticollis or muscle imbalance. The physiotherapist helps the baby regain balanced mobility and offers suitable daily exercises.
Duration and follow-up of treatment
The duration depends on the baby's age, the severity of the plagiocephaly, and the responsiveness to treatment. In general, the earlier you act, the faster the results.
FAQ – 5 popular questions
Is flat head syndrome serious? What are the potential consequences?
Flat head syndrome is most often benign, but in some cases, if it is significant or persistent, it can affect facial symmetry and sometimes motor development. It can also be the cause of certain disorders: GERD, colic, sleep disorders... Hence the importance of prevention.
When to consult a pediatrician or specialist?
If the flattening is pronounced after 3 months, or if you notice asymmetries, poor head positioning, or torticollis.
Are there any useful accessories?
Some ergonomic pillows for infants or children can limit pressure on the skull, but they are never recommended for sleeping in the crib. However, physiological babywearing is an effective and risk-free solution.
Does my baby necessarily develop a delay?
No. Mild plagiocephaly does not cause delay. But if it is associated with torticollis or motor defect, follow-up may be useful.
Is osteopathy useful?
Yes, if practiced by an osteopath trained in pediatrics. It involves balancing and reshaping the baby's skull, it can help release tensions, correct torticollis, and improve the baby's overall mobility.
In summary
Flat head syndrome in babies, also known as plagiocephaly, is not uncommon... but it is not inevitable. With good habits from the first weeks – such as varying positions, stimulating mobility, limiting prolonged pressure, and promoting physiological babywearing – you can prevent or naturally correct it.
The most important thing? Observe, adapt, seek advice. Every baby is unique. And sometimes, all it takes is a little help (or a well-tied wrap) to let nature do the rest 💛