Does Torticollis Cause Plagiocephaly in Babies?

A baby who consistently looks to one side can develop a flat patch surprisingly quickly. So, does torticollis cause plagiocephaly? It can be a significant contributing factor. Torticollis does not change the skull on its own, but the head preference it creates can place repeated pressure on the same area of a soft, growing head.

The reassuring news is that early recognition makes a real difference. With the right assessment, gentle treatment and consistent positioning support, many babies make very good progress without the need for invasive intervention.

Does torticollis cause plagiocephaly?

Torticollis means a baby has a persistent tilt or rotation of the neck. Often, this happens because one of the neck muscles, commonly the sternocleidomastoid muscle, is tight or shortened. Your baby may find it easier to turn their head towards one side and harder to look the other way.

Plagiocephaly is an asymmetrical flattening of the head, usually at the back or one side. When a baby repeatedly rests with their head in the same position, the pressure can gradually flatten that area. The ear on the flatter side may appear to sit slightly further forward, and the forehead can sometimes look more prominent on that side too.

This is why torticollis and plagiocephaly are so often seen together. A restricted neck makes one resting position feel familiar and comfortable. In turn, a flat spot can make the preference more noticeable. It is not always possible to say which appeared first, but treating both concerns together is usually the most helpful approach.

Not every baby with torticollis develops plagiocephaly, and not every flat head is caused by torticollis. Babies can develop positional flattening for other reasons, including spending long periods on their back outside sleep, being born prematurely, a multiple birth, or having a naturally strong preference for one side. The key issue is repeated pressure in the same place during a period when the skull is still highly mouldable.

What torticollis can look like in everyday life

Parents are often the first to spot the pattern. During feeds, your baby may settle more easily on one breast or bottle-feeding side. In the cot, they may turn their face towards the same wall every time. During tummy time, they may struggle to lift or rotate their head evenly.

You might also notice that one side of the neck looks tighter, that your baby’s chin points towards one shoulder while the head tilts towards the other, or that they become upset when you gently encourage them to look in their less favoured direction. Some babies have a small, firm lump in the neck muscle in the early weeks, which should always be assessed by a health professional.

A head preference is common, particularly in young babies, and it is not a sign that you have done anything wrong. However, a preference that persists beyond a few weeks, becomes stronger, or is accompanied by visible flattening deserves prompt attention. Babies grow rapidly in their first months, so the earlier you address the cause of the pressure, the more opportunity there is for natural head-shape improvement.

Why safe sleep can make positioning support necessary

Babies should always be placed on their backs for every sleep, in line with safer sleep guidance. Back sleeping has dramatically reduced the risk of sudden infant death syndrome and should not be changed because of a flat spot or torticollis.

The practical challenge is that a baby with a head preference may keep their head turned to the same side while asleep. This does not mean parents should use wedges, pillows, sleep positioners or homemade supports in the cot. These can create serious safety risks. Instead, the focus should be on addressing the neck restriction, creating variety while your baby is awake, and seeking suitable professional advice about any sleep product.

A baby’s sleep surface and sleep set-up should always be appropriate for their age and used exactly as directed. If you are considering a specialist head-shape mattress, ask how it has been clinically evaluated, whether it is designed for your baby’s stage, and how it fits alongside current safer sleep guidance. Evidence and safety should lead the decision, not anxiety or a quick-fix promise.

What to do if your baby has a head preference

Start by raising it with your health visitor, GP or paediatric clinician. They can assess whether your baby’s head position is likely to be muscular torticollis and whether referral to a paediatric physiotherapist, osteopath or another appropriate specialist is needed. A clinician should also rule out less common causes of a tilted head, including eye or neurological concerns.

Treatment for muscular torticollis commonly involves gentle stretches, handling advice and play-based exercises tailored to your baby. Do not force your baby’s head into a position or copy stretches from social media without guidance. A small baby’s neck needs careful, individual assessment.

At home, you can support the work of your clinician by making your baby’s non-preferred side more interesting during awake time. Position yourself, toys or a source of light on that side when you are talking and playing. Alternate the arm you use for carrying and the side you approach from when settling them. During feeds, vary positions where practical so your baby has opportunities to turn both ways.

Supervised tummy time is particularly valuable. It reduces time spent with pressure on the back of the head while building the neck, shoulder and trunk strength needed for more balanced movement. Begin with short, frequent sessions from the earliest days if your baby is comfortable, including tummy time on your chest or across your lap. Little and often is usually more successful than waiting for one long session.

Try to reduce unnecessary time in car seats, bouncers and other semi-reclined equipment when you are at home. These products are useful for travel and brief, supervised periods, but they do not provide much opportunity for free movement. Floor play on a firm, clear surface gives your baby space to practise turning, reaching and eventually rolling.

When should you seek more urgent advice?

Speak to a healthcare professional promptly if your baby’s head seems unusually shaped from birth, if a ridge can be felt along the skull, or if the soft spot appears unusual. These signs do not necessarily indicate a serious problem, but they need expert assessment to distinguish positional plagiocephaly from rarer conditions affecting skull growth.

You should also seek advice quickly if your baby has pain, fever, a sudden new head tilt, reduced movement of an arm or leg, poor feeding, vomiting, unusual sleepiness, or changes in eye movement. A baby who cannot turn their head in either direction, rather than simply preferring one side, should not be managed with positioning alone.

For most families, the concern is less dramatic but still emotionally difficult: you can see the flat area becoming clearer in photographs, or you feel guilty every time you lay your baby down. Please be kind to yourself. Positional head flattening became more common because parents correctly follow back-to-sleep guidance. Getting support early is a proactive step, not an admission that you have missed something.

Can treating torticollis improve head shape?

Often, yes. When your baby can comfortably move their neck in both directions, they are more able to vary the areas of their head that take pressure. Combined with supervised tummy time, reduced container time and a plan that suits your baby’s age and severity of flattening, this can support gradual improvement.

Progress is rarely instant. Head growth, movement development and the consistency of treatment all matter. A younger baby with mild flattening and an early-treated head preference may improve relatively quickly. More pronounced asymmetry, persistent torticollis or a baby approaching the stage where head growth slows may need closer follow-up and a more structured treatment plan.

SleepCurve was developed by a UK Paediatric Cranial Osteopath and has been clinically studied at Alder Hey Children’s Hospital, where the SleepCurve baby mattress showed an average 97% improvement in head shape over six months. For parents exploring supportive options, clinical evidence and guidance from the professionals caring for your baby should remain central.

The most useful next step is simple: trust what you are seeing, arrange an assessment, and begin gentle, consistent support as early as you can. Your baby does not need perfect positioning every minute – they need a plan that protects safe sleep, encourages comfortable movement and gives their growing head the best chance to develop well.