Medical Conditions

Does My Baby Need a Helmet for Flat Head?

Medically reviewed by Dr. Michael Okonkwo, MD, FAAP · Board-Certified Neonatologist

Content reviewed against published AAP, NIH, Mayo Clinic guidelines

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If your baby has been diagnosed with or you suspect does my baby need a helmet for flat head, here is what the evidence says.

The short answer

Helmet therapy (cranial orthosis) may be recommended for moderate to severe positional plagiocephaly that has not improved with repositioning techniques by age 4-6 months. Helmets work by gently guiding skull growth and are most effective when started between 4-6 months of age, when head growth is most rapid. Mild cases often improve on their own with repositioning and tummy time. The decision depends on severity, age, and whether conservative measures have been tried.

Key takeaways

  • Helmet therapy (cranial orthosis) may be recommended for moderate to severe positional plagiocephaly that has not improved with repositioning techniques by age 4-6 months. Helmets work by gently guiding skull growth and are most effective when started between 4-6 months of age, when head growth is most rapid. Mild cases often improve on their own with repositioning and tummy time. The decision depends on severity, age, and whether conservative measures have been tried.
  • Usually normal when: Mild flat spot that is improving with repositioning and increased tummy time
  • Call your doctor if: You notice a ridge or abnormal shape on your baby's skull that seems different from positional flattening (possible craniosynostosis, which requires different treatment)
  • Varies by age — see the age-by-age breakdown below
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What Parents Should Know

According to AAP, NIH, Mayo Clinic guidelines, helmet therapy (cranial orthosis) may be recommended for moderate to severe positional plagiocephaly that has not improved with repositioning techniques by age 4-6 months. Helmets work by gently guiding skull growth and are most effective when started between 4-6 months of age, when head growth is most rapid. Mild cases often improve on their own with repositioning and tummy time. The decision depends on severity, age, and whether conservative measures have been tried. At 0-3 months, this is the prevention and repositioning window. Techniques include alternating the direction your baby faces in the crib, increasing supervised tummy time, holding your baby upright, and minimizing time in car seats and bouncers. If torticollis is contributing to a head preference, physical therapy should start early. Helmet therapy is not typically started this young. It is generally considered normal when mild flat spot that is improving with repositioning and increased tummy time. However, you should contact your pediatrician promptly if you notice a ridge or abnormal shape on your baby's skull that seems different from positional flattening (possible craniosynostosis, which requires different treatment).

Sources: [1], [2], [3]

Normal vs. Concerning

Usually Normal
Worth Discussing
Mild flat spot that is improving with repositioning and increased tummy time
You notice a ridge or abnormal shape on your baby's skull that seems different from positional flattening (possible craniosynostosis, which requires different treatment)
Your pediatrician has assessed the asymmetry as mild and recommends continuing conservative measures
Your baby has progressive head shape changes with signs of increased pressure: bulging fontanelle, vomiting, irritability, or rapid head growth
Your baby is in a helmet and the head shape is gradually improving with treatment
You notice a flat spot on your baby's head that is not improving with repositioning

By Age

What to expect by age

0-3 months

This is the prevention and repositioning window. Techniques include alternating the direction your baby faces in the crib, increasing supervised tummy time, holding your baby upright, and minimizing time in car seats and bouncers. If torticollis is contributing to a head preference, physical therapy should start early. Helmet therapy is not typically started this young.

3-6 months

If repositioning has not improved the flat spot by 4-6 months, your pediatrician may refer for helmet evaluation. The ideal window for starting helmet therapy is 4-6 months when head growth is fastest. A specialist will measure the degree of asymmetry to determine if a helmet is warranted. Moderate to severe asymmetry benefits most from helmeting.

6-12 months

Helmets can still be effective between 6-12 months but work more slowly as head growth decelerates. Treatment typically takes 2-4 months with the helmet worn 23 hours per day. The helmet is custom-made from a 3D scan of your baby's head. Follow-up visits every 2-3 weeks ensure proper fit as the head grows.

12-24 months

Helmet therapy after 12 months is generally not recommended because head growth has slowed significantly and the skull bones are becoming less malleable. After age 1, many cases of mild to moderate plagiocephaly continue to improve gradually on their own as the child grows and their head proportions change.

2-3 years

By this age, the head shape typically continues to improve as hair growth further disguises asymmetry. Most positional plagiocephaly has no functional consequences and is purely cosmetic. Severe cases that did not receive treatment may have more persistent asymmetry, but this continues to improve somewhat with growth throughout childhood.

What to Tell Your Pediatrician

  • Describe when you first noticed does my baby need a helmet for flat head and how it has changed over time.
  • Note your baby's current age and which age-specific patterns you are seeing.
  • Mention if you notice a flat spot on your baby's head that is not improving with repositioning.
  • Mention if your baby strongly prefers one head position despite your efforts.
  • Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
  • Bring a list of any questions or observations you want to discuss at the appointment.

What Should You Do?

When to take action

Probably normal when...
  • Mild flat spot that is improving with repositioning and increased tummy time
  • Your pediatrician has assessed the asymmetry as mild and recommends continuing conservative measures
  • Your baby is in a helmet and the head shape is gradually improving with treatment
Mention at your next visit when...
  • You notice a flat spot on your baby's head that is not improving with repositioning
  • Your baby strongly prefers one head position despite your efforts
  • You want to know whether helmet therapy is appropriate for your baby's level of asymmetry
Act now when...
  • You notice a ridge or abnormal shape on your baby's skull that seems different from positional flattening (possible craniosynostosis, which requires different treatment)
  • Your baby has progressive head shape changes with signs of increased pressure: bulging fontanelle, vomiting, irritability, or rapid head growth

What You Can Do at Home

  • Keep track of when you notice does my baby need a helmet for flat head — noting the time of day, duration, and any triggers can help your pediatrician.
  • Remember that mild flat spot that is improving with repositioning and increased tummy time — this is generally within the range of normal.
  • At 0-3 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
  • Follow any care instructions from your pediatrician. Keep a written log of symptoms to bring to appointments.
  • While monitoring at home, seek immediate care if you notice a ridge or abnormal shape on your baby's skull that seems different from positional flattening (possible craniosynostosis, which requires different treatment).

My Baby Is Getting a Cranial Helmet - Common Concerns

Cranial helmets are safe and well-tolerated by most babies. Common concerns include skin irritation, sweating, smell, and worry about developmental effects - all of which are manageable. The helmet is custom-fitted and worn 23 hours per day (removed for bathing). Most treatment courses last 2-4 months. Side effects are minor: mild skin redness, occasional rash, and increased scalp sweating. Babies typically adjust within a few days.

My Baby Tilts Their Head to One Side - Is It Torticollis?

A persistent head tilt in a baby is most commonly caused by congenital muscular torticollis (a tight sternocleidomastoid muscle), which is treatable with physical therapy. However, other causes include eye problems (the baby tilts to compensate for misaligned eyes), hearing issues, neurological conditions, Sandifer syndrome (reflux-related posturing), or structural cervical spine issues. Any persistent head tilt should be evaluated to identify the cause.

Treatment for Congenital Muscular Torticollis

Congenital muscular torticollis (CMT) is treated primarily with physical therapy, including gentle stretching exercises, positioning strategies, and strengthening activities. When started within the first 3 months of life, over 90% of cases resolve with physical therapy alone within 6-12 months. Treatment includes specific stretches performed during diaper changes and play, repositioning techniques, and increased tummy time on the non-preferred side. Surgery is rarely needed (less than 5% of cases).

craniosynostosis surgery

Milestone

Month-by-Month Development

Detailed monthly development guides from birth through 24 months.

Guide

When to Call the Doctor

General guide on when to call the pediatrician, visit urgent care, or go to the ER.

Frequently asked questions

Is does my baby need a helmet for flat head normal?
Helmet therapy (cranial orthosis) may be recommended for moderate to severe positional plagiocephaly that has not improved with repositioning techniques by age 4-6 months. Helmets work by gently guiding skull growth and are most effective when started between 4-6 months of age, when head growth is most rapid. Mild cases often improve on their own with repositioning and tummy time. The decision depends on severity, age, and whether conservative measures have been tried.
When should I call the doctor about does my baby need a helmet for flat head?
You notice a ridge or abnormal shape on your baby's skull that seems different from positional flattening (possible craniosynostosis, which requires different treatment) Your baby has progressive head shape changes with signs of increased pressure: bulging fontanelle, vomiting, irritability, or rapid head growth
When is does my baby need a helmet for flat head normal?
Mild flat spot that is improving with repositioning and increased tummy time Your pediatrician has assessed the asymmetry as mild and recommends continuing conservative measures Your baby is in a helmet and the head shape is gradually improving with treatment
What causes does my baby need a helmet for flat head?
Helmet therapy (cranial orthosis) may be recommended for moderate to severe positional plagiocephaly that has not improved with repositioning techniques by age 4-6 months. Helmets work by gently guiding skull growth and are most effective when started between 4-6 months of age, when head growth is most rapid. Mild cases often improve on their own with repositioning and tummy time. The decision depends on severity, age, and whether conservative measures have been tried. Common explanations include: Mild flat spot that is improving with repositioning and increased tummy time. Your pediatrician has assessed the asymmetry as mild and recommends continuing conservative measures.
What should I mention to my pediatrician about does my baby need a helmet for flat head?
You should mention does my baby need a helmet for flat head at your next visit if: You notice a flat spot on your baby's head that is not improving with repositioning. Your baby strongly prefers one head position despite your efforts. You want to know whether helmet therapy is appropriate for your baby's level of asymmetry.
Is does my baby need a helmet for flat head normal at 0-3 months?
This is the prevention and repositioning window. Techniques include alternating the direction your baby faces in the crib, increasing supervised tummy time, holding your baby upright, and minimizing time in car seats and bouncers. If torticollis is contributing to a head preference, physical therapy should start early. Helmet therapy is not typically started this young.
Is does my baby need a helmet for flat head normal at 3-6 months?
If repositioning has not improved the flat spot by 4-6 months, your pediatrician may refer for helmet evaluation. The ideal window for starting helmet therapy is 4-6 months when head growth is fastest. A specialist will measure the degree of asymmetry to determine if a helmet is warranted. Moderate to severe asymmetry benefits most from helmeting.
Should I go to the ER for does my baby need a helmet for flat head?
Seek emergency care if you notice a ridge or abnormal shape on your baby's skull that seems different from positional flattening (possible craniosynostosis, which requires different treatment), or if your baby has progressive head shape changes with signs of increased pressure: bulging fontanelle, vomiting, irritability, or rapid head growth. When in doubt, call your pediatrician's after-hours line for guidance.
Does does my baby need a helmet for flat head go away on its own?
In many cases, does my baby need a helmet for flat head resolves on its own, especially when mild flat spot that is improving with repositioning and increased tummy time. By 2-3 years, by this age, the head shape typically continues to improve as hair growth further disguises asymmetry. Most positional plagiocephaly has no functional consequences and is purely cosmetic. Severe cases that did not receive treatment may have more persistent asymmetry, but this continues to improve somewhat with growth throughout childhood.
AAPNIHMAYO CLINIC

References

  1. [1]American Academy of Pediatrics. Prevention and Management of Positional Skull Deformities in Infants. Pediatrics, 2011. AAP
  2. [2]National Library of Medicine. Helmet Therapy for Positional Plagiocephaly. JAMA Pediatrics. NIH
  3. [3]Mayo Clinic. Plagiocephaly: Is head shaping therapy necessary? Mayo Clinic

Doctor Visit Checklist

Bring this checklist to your next pediatrician visit to discuss Does My Baby Need a Helmet for Flat Head?.

Things to mention

  • Describe when you first noticed does my baby need a helmet for flat head and how it has changed over time.
  • Note your baby's current age and which age-specific patterns you are seeing.
  • Mention if you notice a flat spot on your baby's head that is not improving with repositioning.
  • Mention if your baby strongly prefers one head position despite your efforts.
  • Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
  • Bring a list of any questions or observations you want to discuss at the appointment.

Observations to share

  • You notice a flat spot on your baby's head that is not improving with repositioning
  • Your baby strongly prefers one head position despite your efforts
  • You want to know whether helmet therapy is appropriate for your baby's level of asymmetry

Urgent signs to report immediately

  • You notice a ridge or abnormal shape on your baby's skull that seems different from positional flattening (possible craniosynostosis, which requires different treatment)
  • Your baby has progressive head shape changes with signs of increased pressure: bulging fontanelle, vomiting, irritability, or rapid head growth

My notes

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Bottom line

Most cases of does my baby need a helmet for flat head are normal. Talk to your pediatrician if you notice a ridge or abnormal shape on your baby's skull that seems different from positional flattening (possible craniosynostosis, which requires different treatment).

Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.

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Related Medical Concerns

My Baby Is Getting a Cranial Helmet - Common Concerns

Cranial helmets are safe and well-tolerated by most babies. Common concerns include skin irritation, sweating, smell, and worry about developmental effects - all of which are manageable. The helmet is custom-fitted and worn 23 hours per day (removed for bathing). Most treatment courses last 2-4 months. Side effects are minor: mild skin redness, occasional rash, and increased scalp sweating. Babies typically adjust within a few days.

My Baby Tilts Their Head to One Side - Is It Torticollis?

A persistent head tilt in a baby is most commonly caused by congenital muscular torticollis (a tight sternocleidomastoid muscle), which is treatable with physical therapy. However, other causes include eye problems (the baby tilts to compensate for misaligned eyes), hearing issues, neurological conditions, Sandifer syndrome (reflux-related posturing), or structural cervical spine issues. Any persistent head tilt should be evaluated to identify the cause.

Treatment for Congenital Muscular Torticollis

Congenital muscular torticollis (CMT) is treated primarily with physical therapy, including gentle stretching exercises, positioning strategies, and strengthening activities. When started within the first 3 months of life, over 90% of cases resolve with physical therapy alone within 6-12 months. Treatment includes specific stretches performed during diaper changes and play, repositioning techniques, and increased tummy time on the non-preferred side. Surgery is rarely needed (less than 5% of cases).

My Baby's Head Shape Looks Abnormal

Many babies develop temporary head shape irregularities that are completely normal. A cone-shaped head from vaginal delivery reshapes within days. Mild positional flattening (plagiocephaly) from sleeping on the back is very common and usually improves with repositioning and tummy time. However, head shape changes involving ridges, a persistently bulging fontanelle, or rapid head growth changes should be evaluated to rule out craniosynostosis.

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Achondroplasia is the most common form of short-limbed dwarfism, affecting about 1 in 15,000 to 40,000 births. It is caused by a mutation in the FGFR3 gene and is usually apparent at birth with characteristic features including short limbs, a larger head, and a prominent forehead. Intelligence is normal. With monitoring for specific complications and supportive care, children with achondroplasia lead full, active, and independent lives.

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Adenoids are lymphoid tissue located behind the nose that help fight infection in young children. When adenoids become enlarged (adenoid hypertrophy), they can block the nasal airway, causing chronic mouth breathing, snoring, nasal speech, and sleep-disordered breathing. Enlarged adenoids are most common between ages 2-7 and are a leading cause of obstructive sleep apnea in young children. Treatment ranges from watchful waiting and nasal steroids to surgical removal (adenoidectomy) if breathing or sleep is significantly affected.