Baby Helmet For Flat Head

Overview

Many babies develop a flattened area on their head in the first few months of life. Doctors call this 'positional plagiocephaly' (a flat spot on one side) or 'brachycephaly' (a flat area across the back). It happens because a baby's skull is soft and still growing, so pressure from lying in the same position can gently mould the shape of the head. A 'baby helmet' (sometimes called a moulding helmet or cranial orthosis) is a hard plastic shell with a soft lining, custom-made to fit a baby's head. The idea is that it takes pressure off the flat area and leaves room for the head to grow into a rounder shape. Helmets are only one option, and many doctors suggest trying simple repositioning and tummy time first.

Yes. Flat head shape is one of the most common things parents ask about at baby check-ups. Studies suggest that around 1 in 5 babies have some flattening by the age of 4 months, and it has become more common since parents were advised to put babies to sleep on their backs — advice that has greatly reduced the risk of sudden infant death.

It mainly affects babies in the first 6 to 8 months of life, when the skull is softest and babies spend a lot of time lying down. It is a little more common in babies born early, twins and multiples, babies with a preference for turning their head to one side, and babies who spend long periods in car seats or bouncy chairs.

Symptoms

Common symptoms

• A flat patch on one side of the back of the head, or a flat area straight across the back
• The head looks uneven when seen from above, sometimes a bit like a parallelogram
• One ear may sit further forward or look higher than the other
• The forehead may bulge slightly on one side
• Less hair on the flat area, or a small bald patch from rubbing
• A habit of turning the head to one favourite side

Symptoms in children

• The shape difference is usually easiest to see when your baby's hair is wet or when you look from above
• Some babies with flattening also have a tight neck muscle (called torticollis), which makes turning the head to one side harder
• Your baby may seem to prefer looking in one direction during feeding or play
• In most babies the flat area does not seem to bother them at all — they feed, sleep and play normally

Symptoms in older adults

• This is a baby and young child issue, so it does not apply to older adults
• In an older child or adult, a new change in head shape is not normal and should always be checked by a doctor

Causes

Main causes

• Pressure on a soft skull from lying in the same position for long periods
• Sleeping on the back — this is the safest sleeping position, and it is not a mistake to follow this advice
• Spending lots of time in car seats, prams, swings and bouncy chairs where the head rests against a surface
• A preference for turning the head to one side, sometimes because of a tight neck muscle (torticollis)
• Being born early or being a twin, so there was less room in the womb and the skull is softer

Risk factors

• Premature birth
• Twins or multiples
• A limited space in the womb, or a baby who was in a breech position
• Neck tightness or a head-turning preference
• Long periods in the same lying position or in car seats
• Being a first baby, where parents may have less experience of varying positions
• Delays in sitting up and crawling, so more time is spent lying down

When to see a doctor

See a doctor urgently if:

• You notice the head shape getting clearly worse in a short time
• You feel a hard ridge along the skull, or the head shape looks unusual from the side (for example, very tall and narrow)
• Your baby always looks in one direction and cannot turn the head the other way
• Your baby seems unwell, is feeding poorly, or has a fever, especially if under 3 months

Book a routine appointment if:

• You notice a flat patch and want to check it is nothing to worry about
• The flat area is not improving as your baby gets older
• You would like to talk about helmet therapy and whether it might help
• You are worried about how the shape of the head looks, or people have commented on it
• You would like advice on tummy time, carrying and feeding positions

Diagnosis

A doctor or health visitor usually diagnoses a flat head by looking at and gently feeling your baby's head. They will look from above and from the side, check where the ears sit, and see whether the forehead looks even. They will also check how well your baby can turn their head in each direction, and measure the head size. This is quick, painless and needs no special equipment.

Tests that may be done

• A physical examination of the head, face, ears and neck
• Measuring the head size and plotting it on a growth chart
• Watching how your baby moves their neck and head
• Photographs taken from set angles, which can help track changes over time
• In rare cases, a referral to a specialist if craniosynostosis is suspected; imaging such as a skull X-ray or scan is only used when there is a real concern

What to expect at your appointment

The appointment is usually short and gentle. Your doctor may ask about your baby's sleeping position, feeding, and how much time they spend in car seats or bouncy chairs. You will likely be given simple advice on varying positions and tummy time. If a helmet is being considered, you would usually be referred to a specialist clinic that measures the head carefully and talks through the pros and cons.

Treatment

For most babies, treatment means simple changes at home plus time. As babies grow and become more mobile, the flat area usually rounds out over months. Repositioning and tummy time are the first steps and are recommended for every baby. Helmet therapy is an option some families choose, but the evidence about how much it helps is mixed, and it is not usually available on the NHS. If your baby has a tight neck muscle, physiotherapy (exercises and stretches taught by a trained therapist) is often very helpful.

Self-care at home

• Always put your baby to sleep on their back — this is the safest sleep position and should never be changed to treat head shape
• While your baby is awake and supervised, vary the side their head rests on: alternate which end of the cot you lay them, and change the direction they face the room
• Do short, frequent tummy time sessions when your baby is awake and you are watching — start with a minute or two and build up
• Hold your baby upright in your arms often, and vary which arm you use for feeding and carrying
• Limit long stretches in car seats, prams, swings and bouncy chairs, and take breaks on longer journeys
• Try different play positions, such as lying your baby on their side (while awake and supervised) with a toy to look at
• If your baby favours one side, gently encourage looking the other way with toys, mirrors or your face

Medical treatments

Doctors may recommend physiotherapy for neck tightness, which involves gentle exercises and stretches taught by a children's physiotherapist. Some families are referred to a specialist clinic to discuss helmet therapy. A moulding helmet is custom-made from a scan or plaster mould of the baby's head. It is usually worn for around 23 hours a day, with short breaks for washing and checking the skin, for a few months. It needs regular review visits to adjust the fit as the head grows. Helmets can cause skin irritation, sweating and discomfort, and they need careful cleaning. Some clinics offer helmet therapy privately for a fee, and availability and advice vary between services — ask your doctor what is offered in your area. Surgery is not used for ordinary flat head shape.

When is surgery considered?

Surgery is not used to treat positional flat head shape. It is only considered for a different, rare condition called craniosynostosis, where the skull bones join too early and can press on the growing brain. That condition is diagnosed by specialist teams and treated in specialist children's hospitals. If a doctor ever suspects it, you would be referred quickly for expert assessment.

Living with this condition

Day to day, the main thing is to keep your baby's sleep safe and add variety to the rest of the day. Use awake, supervised time for tummy time and different positions. If your baby wears a helmet, you will need to check the skin underneath often, clean the helmet as your clinic advises, and keep up with follow-up appointments. Many parents find a simple photo once a month helps them see that things are slowly improving.

Lifestyle tips

• Keep a simple routine of back sleeping, supervised tummy time and cuddles in different positions
• Rotate toys and your baby's position during play so they practise looking both ways
• Take breaks from car seats and bouncy chairs, and carry your baby in your arms or a sling when you can
• Ask family and friends not to comment on your baby's head shape — it can feel surprisingly upsetting

Diet and exercise

Feed your baby as you normally would — breast milk or formula is all a baby this age needs, and no special diet affects head shape. For movement, the key 'exercise' is tummy time and floor play. Tummy time builds neck, shoulder and arm strength and takes pressure off the back of the head. Build it up gradually and stop if your baby is unhappy, then try again later. Never leave a baby on their tummy to sleep.

Mental health and emotional wellbeing

It is very common for parents to feel guilty or worried when they notice a flat head, and to blame themselves for something they did or did not do. Please be kind to yourself — following safe sleep advice is the right thing to do, and flat head shape is a common side effect of that advice, not a parenting mistake. If you are feeling low, anxious or overwhelmed, talk to your doctor or health visitor. If you ever feel hopeless or unable to cope, contact your doctor or a crisis support line in your country straight away, or call your local emergency number if you feel you might harm yourself.

Prevention

You cannot fully prevent a flat head, and it is not your fault if one develops. The most important prevention message is this: always place your baby on their back to sleep, because this protects against sudden infant death. The safe way to reduce flattening is to vary your baby's head position and give them supervised tummy time while they are awake. These small changes can make a real difference, especially in the first few months.

Screening programmes

There is no special screening programme for flat head shape. Instead, your baby's head is checked at routine baby checks, and you can raise any concerns with your health visitor or doctor at any time.

Complications

If left untreated

• Most flat areas improve without any treatment, especially once a baby sits and moves more
• Some children keep a mild unevenness into school age, but it is usually hidden by hair
• Rarely, a more noticeable shape difference can affect how glasses or hats fit
• Some older children may feel self-conscious about head shape, which is a reason some families choose treatment
• Positional flat head does not affect brain development or learning
• The main risk of helmet therapy itself is skin irritation, sweating and discomfort, plus the cost, travel and time involved

Long-term outlook

Very good. Flat head shape is a common, harmless and usually temporary issue. Most babies improve steadily over the first year or two, particularly once they can sit, crawl and walk. If you choose helmet therapy, remember that experts disagree about how much extra benefit it gives compared with time and repositioning alone. Either way, your baby's head shape is very likely to look much rounder as they grow, and any remaining difference is usually minor.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.