Key takeaway. Does your baby always look to one side? Learn the difference between a preference and restricted neck movement, what to observe, and how to protect safe sleep.
Why babies sometimes favour one side
Newborns can develop a preferred head position. A preference does not automatically mean a medical problem, but a persistent tilt, restricted turning or progressive flattening deserves attention. Looking at how freely your baby moves while awake is more informative than judging one sleeping position.
Preference, postural torticollis and muscular torticollis
A baby who favours one side may still be able to turn freely in both directions. Torticollis can involve a persistent tilt and, in some cases, restricted neck movement. The distinction requires a clinical assessment. Do not attempt forceful neck stretches or try to diagnose restricted movement yourself.
What you can safely observe at home
During calm awake moments, watch whether your baby turns towards your voice or face on either side. Notice how they position their head during feeds, carrying and play. Share a clear description with a healthcare professional if the pattern persists.
What is positional plagiocephaly?
A repeated pressure point on the back of the head can contribute to a flattened area. Positional plagiocephaly describes asymmetrical flattening. A flat spot and torticollis can occur together, but neither proves the other. The clinician examines head shape and neck movement.
How to encourage movement while awake
Change where you sit, alternate carrying positions and offer gentle visual or sound cues from both sides. Supervised tummy time on a firm surface while your baby is awake can support movement. Follow your baby’s tolerance; do not force positions or leave them unattended.
Safe sleep rules must not change
Always place your baby on their back for sleep, on a firm, flat mattress in a clear cot. Do not use wedges, anti-flat-head pillows, positioning cushions or loose bedding. Sleeping on the side or stomach is not a safe treatment for a flat spot.
When to arrange an assessment
Speak to a doctor if the preference is strong and persistent, the head is consistently tilted, movement seems limited, or flattening becomes more obvious. Early assessment is useful, particularly if physiotherapy is needed.
What can paediatric physiotherapy offer?
When restricted neck mobility accompanies positional flattening, French HAS guidance recommends early physiotherapy together with positioning advice. A trained clinician tailors support to your baby. Online stretching tutorials cannot replace individual assessment.
Preference or restricted movement?
A baby may look more often to one side without having torticollis. The important questions are whether they turn their head spontaneously both ways, whether a tilt persists and whether movement appears restricted or painful. French HAS guidance distinguishes postural torticollis from muscular torticollis with restricted movement. Parents can observe, but should not force the neck to test its range.
What to notice during everyday care
During a calm awake period, watch whether your baby follows your face to either side and turns towards a familiar voice. Notice what happens during carrying and feeding. Repeated observations are more helpful than trying to manipulate the head. A short video of ordinary movement may help you describe your concerns to a clinician, but is not a diagnosis.
What a flat spot may mean
Repeated pressure on the same part of the back of the head can contribute to positional skull flattening, called plagiocephaly when it is asymmetrical. HAS notes that assessment is usually clinical and imaging is rarely required. A flat spot does not automatically mean a baby has torticollis. A clinician examines head shape and neck movement before advising on care.
Helpful changes during awake time
Try sitting on the less-favoured side, changing the arm you use to carry your baby and varying gentle visual or sound cues. Supervised tummy time on a firm surface can be introduced gradually while the baby is awake and comfortable. The goal is to encourage spontaneous movement, not to force a position. Bouncers and infant seats should not replace opportunities to move freely on the floor.
Back sleeping remains essential
Even when a flat spot is visible, do not put your baby to sleep on their stomach or side to correct it. The recommended sleep position remains on the back, on a firm mattress, without pillows, wedges, positioners or anti-flat-head cushions. HAS warns that restrictive products may increase suffocation risks. You can vary the direction of interesting sights in the room without putting accessories in the cot.
When to seek help and what physiotherapy can do
A strong and persistent preference, constant head tilt, difficulty turning or progressive flattening deserves medical assessment. When positional flattening is associated with reduced neck mobility, HAS recommends early advice on positioning together with paediatric physiotherapy. Exercises should be tailored by a trained professional; forceful stretches copied from online videos are not a safe substitute.
Frequently asked questions
Is it normal for a newborn to look more to one side?
A preference can occur, but a persistent tilt or limited turning should be assessed.
Does this always mean torticollis?
No. A preference alone does not establish torticollis.
Should I turn my baby’s head by hand?
Do not force the neck; seek guidance if movement appears restricted.
Can a flat spot affect development?
HAS does not conclude that positional flattening itself causes neurodevelopmental delay.
Should my baby sleep on their side?
No. Place babies on their backs for every sleep.
Are anti-flat-head pillows safe?
No. Positioners and pillows are not recommended for infant sleep.
Does tummy time help?
Supervised awake tummy time encourages movement and reduces constant pressure on the back of the head.
When should I consult?
If the preference is persistent, movement is limited or head flattening progresses.
Will my baby need imaging?
Usually not; assessment of positional flattening is generally clinical.
Can physiotherapy help?
Yes, especially when there is restricted neck movement; treatment should be guided by a paediatric professional.
Sources and further reading
General information only. This article does not replace personalised medical advice.
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