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You may be concerned that your baby develops a different head shape in the first few months, possibly with some flattening on one side.

This is called plagiocephaly and is quite common in babies, as their skull bones are soft and can reshape. The flat area may be at the side or back of your baby's head.

This usually happens as babies tend to lie on their backs or with their head to one side for much of the time. In most cases the head shape will improve on its own over time and will have no effect on brain development.

Your baby's head may not return to a completely typical shape, but by the time they're 1 or 2 years old, any flattening will be be barely noticeable.

Very occasionally, a flat head can be caused by the skull plates forming your child's head joining together too early. There is a medical name for this, craniosynostosis, and it requires specialist review and management.

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When should you worry?

Newborn

NEWBORN

Contact your health visitor or GP if your baby is newborn and they…

  • Feel very stiff, for example:
    • Hold their arms and legs in the same position, such as always pulling their arm into their chest, or always crossing their legs 
    • Find it difficult to change their position on their own 
    • You may also find it difficult to move your baby’s arms or legs, making it tricky to change their nappy or clothes
  • Feel very floppy, or have floppy arms or legs when awake
  • Move their arms and legs in repetitive jerky movements, or writhing movements
  • Don’t have a Grasp Reflex (doesn’t grab your finger or small object when you put it in their hand)
  • Are often startling and you cannot understand why
  • Move one side of their body more than the other, for example:
    • Rarely moves one of their arms compared to the other arm
    • Rarely moves one leg compared to the other leg
    • When your baby startles, one side moves or looks different from the other

6-8 weeks 

6-8 WEEKS

Contact your health visitor or GP if your baby is 6-8 weeks and they…

  • Feel very stiff, for example:
    • Hold their arms and legs in the same position, such as always pulling their arm into their chest, or always crossing their legs 
    • Find it difficult to change their position on their own
    • You may also find it difficult to move your baby’s arms or legs, making it tricky to change their nappy or clothes
  • Feel very floppy, or have floppy arms or legs when awake
  • Move their arms and legs in repetitive jerky movements, or writhing movements
  • Have not started to bring both their hands to their face, or do not move their arms much
  • Keep their hands fisted, and you find it difficult to open their hands
  • Can’t lift their head when lying on their tummy
  • Move one side of their body more than the other, for example:
    • Mostly moves one arm or mostly brings one hand to their face
    • Rarely kicks or moves one leg compared to the other leg

2-3 months

2-3 MONTHS

Contact your health visitor or GP if your baby is 2-3 months and they…

  • Feel very stiff, for example:
    • Hold their arms and legs in the same position, such as always pulling their arm into their chest, or always crossing their legs
    • Find it difficult to change their position on their own
    • You may also find it difficult to move your baby’s arms or legs, making it tricky to change their nappy or clothes
  • Feel very floppy, or have floppy arms or legs when awake
  • Move their arms and legs in repetitive jerky movements, or writhing movements
  • Have not started to bring both their hands to their face, or do not move their arms much
  • Keep their hands fisted, and you find it difficult to open their hands
  • Can’t lift their head when lying on their tummy
  • Move one side of their body more than the other, for example:
    • Mostly moves one arm or mostly brings one hand to their face
    • Rarely kicks or moves one leg compared to the other leg

3-4 months

3-4 MONTHS

Contact your health visitor or GP if your baby is 3-4 months and they…

  • Have lost skills which they could do before
  • Feel very stiff, for example:
    • Hold their arms and legs in the same position, such as always pulling their arm to their chest, or always crossing their legs
    • Find it difficult to change their position on their own
    • You find it difficult to move your baby’s arms or legs, making it tricky to change their nappy or clothes
  • Feel very floppy when awake
  • Prefer to keep their arms by their sides. For example, they do not reach for things, or do not bring their hands together over their face or tummy
  • Move their arms or legs in repetitive, jerky, or strange ways
  • Still need you to support their head, or can’t lift their head when lying on their tummy 
  • Have very tight fists and it’s hard to open their hand
  • Move one side of their body more than the other, for example:
    • Rarely use one of their arms to pick up toys 
    • Rarely kick one leg compared to the other

4-6 months

4-6 MONTHS

Contact your health visitor or GP if your baby is 4-6 months and they…

  • Have lost skills which they could do before
  • Feel very stiff, for example:
    • Hold their arms and legs in the same position, such as always pulling their arm to their chest, or always crossing their legs
    • Find it difficult to change their position on their own
    • You find it difficult to move your baby’s arms or legs, making it tricky to change their nappy or clothes
  • Feel very floppy when they are awake
  • Move their arms or legs in repetitive, jerky, or strange ways
  • Move one side of their body more than the other, for example:
    • Rarely use one of their arms to pick up toys 
    • Rarely kick one leg compared to the other
  • Are unable to roll, or can roll in one direction but not the other
  • Find it difficult to reach their arms out. For example, they do not reach for toys
  • Still have their early reflexes, like the startle reflex and grasp reflex
  • Keep their legs flat when lying on their back. For example, they do not bring their feet to their chest
  • Still need you to support their head

6-9 months

6-9 MONTHS

Contact your health visitor or GP if your baby is 6-9 months and they…

  • Have lost skills which they could do before
  • Feel very stiff, for example:
    • Hold their arms and legs in the same position, such as always pulling their arm to their chest, or always crossing their legs
    • Find it difficult to change their position on their own
    • You find it difficult to move your baby’s arms or legs, making it tricky to change their nappy or clothes
  • Feel very floppy when they are awake
  • Move their arms or legs in repetitive, jerky or strange ways
  • Move one side of their body more than the other, for example:
    • Rarely use one of their arms to pick up toys, or eat and drink
    • Rarely kick one leg compared to the other
  • Can’t sit without support. For example, they lean on their hand, or, when they sit, their back is very curved
  • Still have their early reflexes, like the startle reflex and grasp reflex
  • Keep their legs flat when lying on their back, for example, do not bring their feet to their chest
  • Still need you to support their head
  • Still need you to help turn their head when lying on their back
  • Can’t crawl, or find it hard, for example, drags one of their legs behind them
  • Find it difficult to stand, for example:
    • Can’t stand with support 
    • Doesn’t try to pull themselves up to stand
  • Can’t move a toy from one hand to the other
  • Doesn’t use both hands to hold larger things

9-12 months

9-12 MONTHS

Contact your health visitor or GP if your baby is 9-12 months and they…

  • Have lost skills which they could do before
  • Feel very stiff, for example:
    • Hold their arms and legs in the same position, such as always pulling their arm to their chest, or always crossing their legs
    • Find it difficult to change their position on their own 
    • You find it difficult to move your baby’s arms or legs, making it tricky to change their nappy or clothes
  • Feel very floppy when they are awake
  • Move their arms and legs in repetitive, jerky, or strange ways
  • Use one side of their body more than the other, for example:
    • Lean to the side when they sit
    • Use one arm to pull to stand more than the other
    • Rarely use one of their arms to pick up toys, or eat and drink. 
    • Rarely kick one leg compared to the other 
  • Find it difficult to sit, for example:
    • Only sit with support
    • Lean on their hand when sitting
    • When they sit their back is very curved
  • Can’t move a toy from one hand to the other
  • Don’t use both hands to hold larger things
  • Don’t point to objects
  • Can’t crawl, or find it hard, for example, drags one leg behind them
  • Find it difficult to stand, for example:
    • Can’t pull themselves up to stand
    • Find it hard to pull themselves up. For example, they only use their arms and don’t push with their legs
    • Can’t stand with support

2 months

Your Baby By Two Months

Social/Emotional Milestones

  • Calms down when spoken to or picked up
  • Looks at your face
  • Seems happy to see you when you walk up to her
  • Smiles when you talk to or smile at her

Language/Communication Milestones

  • Makes sounds other than crying
  • Reacts to loud sounds

Cognitive Milestones (learning, thinking, problem-solving)

  • Watches you as you move
  • Looks at a toy for several seconds

Movement/Physical Development Milestones

  • Holds head up when on tummy
  • Moves both arms and both legs
  • Opens hands briefly

4 months

Your Baby By Four Months

Social/Emotional Milestones

  • Smiles on his own to get your attention
  • Chuckles (not yet a full laugh) when you try to make him laugh
  • Looks at you, moves, or makes sounds to get or keep your attention

Language/Communication Milestones

  • Makes sounds like “oooo”, “aahh” (cooing)
  • Makes sounds back when you talk to him
  • Turns head towards the sound of your voice

Cognitive Milestones (learning, thinking, problem-solving

  • If hungry, opens mouth when he sees breast or bottle
  • Looks at her hands with interest

Movement/Physical Development Milestones

  • Holds head steady without support when you are holding him
  • Holds a toy when you put it in his hand
  • Uses his arm to swing at toys
  • Brings hands to mouth
  • Pushes up onto elbows/forearms when on tummy

6 months

Your Baby By Six Months

Social/Emotional Milestones

  • Knows familiar people
  • Likes to look at self in a mirror
  • Laughs

Language/Communication Milestones

  • Takes turns making sounds with you
  • Blows “raspberries” (sticks tongue out and blows)
  • Makes squealing noises

Cognitive Milestones (learning, thinking, problem-solving)

  • Puts things in her mouth to explore them
  • Reaches to grab a toy she wants
  • Closes lips to show she doesn’t want more food

Movement/Physical Development Milestones

  • Rolls from tummy to back
  • Pushes up with straight arms when on tummy
  • Leans on hands to support herself when sitting

9 months

Your Baby By Nine Months

Social/Emotional Milestones

  • Is shy, clingy, or fearful around strangers
  • Shows several facial expressions, like happy, sad, angry, and surprised
  • Looks when you call her name
  • Reacts when you leave (looks, reaches for you, or cries)
  • Smiles or laughs when you play peek-a-boo

Language/Communication Milestones

  • Makes a lot of different sounds like “mamamama” and “bababababa”
  • Lifts arms up to be picked up

Cognitive Milestones (learning, thinking, problem-solving)

  • Looks for objects when dropped out of sight (like his spoon or toy)
  • Bangs two things together

Movement/Physical Development Milestones

  • Gets to a sitting position by herself
  • Moves things from one hand to her other hand
  • Uses fingers to “rake” food towards himself
  • Sits without support

1 year

Your Baby By One Year

Social/Emotional Milestones

  • Plays games with you, like pat-a-cake

Language/Communication Milestones

  • Waves “bye-bye”
  • Calls a parent “mama” or “dada” or another special name
  • Understands “no” (pauses briefly or stops when you say it)

Cognitive Milestones (learning, thinking, problem-solving)

  • Puts something in a container, like a block in a cup
  • Looks for things he sees you hide, like a toy under a blanket

Movement/Physical Development Milestones

  • Pulls up to stand
  • Walks, holding on to furniture
  • Drinks from a cup without a lid, as you hold it
  • Picks things up between thumb and pointer finger, like small bits of food
RED
RED
AMBER
AMBER
AMBER
AMBER
Green
Green

Advice and Guidance

How can I help?
  • Your baby's head shape should start to improve as your baby grows and start moving around more and spending less time directly on their back.
  • Encourage supervised tummy time when your baby is awake and playing (remember always lay your baby to sleep on their back).
  • Stimulate your baby by talking or showing them toys from one side to encourage them to turn their head onto the non-flattened side.
  • Change which side you hold your baby when you are feeding or carrying them.
  • Alternate your baby's head position between left and right when they are sleeping on their back.

ALWAYS REMEMBER - the safest sleeping position for your baby is on their back.

When should I be concerned?
  • Your baby has difficulty turning their head or has a strong preference for turning their head to one side.
  • Your baby has an unusual shaped head shape or very prominent uneven are which has not got better or has got worse, despite repositioning suggestions described above.
Where can I get help?

Please speak with your health visitor or GP if you have any concerns. They will examine your baby's head and be able to advise you. Sometimes your GP may refer you to see a physiotherapist, or if they suspect that the skull plates have fused too early, a paediatric specialist.

You can also find some more detailed information on the NHS website by clicking here.

Self care and Prevention

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