A baby's head tilts to one side from the first weeks of life, or you notice they always look the same way at you across the cot — most of these babies have a tight muscle on one side of the neck, and the fix is straightforward stretches done at home. The catch is timing. Started before three months, physiotherapy resolves the vast majority of cases. Started after six months, the muscle has had longer to set, and outcomes drop. So if anything looks off about how your baby holds their head, the action is now, not next month.
Healthbooq helps parents tell the difference between things that need watching and things that need a referral.
What You Are Seeing
The classic torticollis posture has two parts and they go together: the head tips toward one shoulder (ear goes down on that side), and the chin turns toward the opposite shoulder. So a baby with a tight right sternocleidomastoid (SCM) tilts their head to the right and turns their face to the left. The reason is mechanical — the SCM muscle runs diagonally from behind the ear to the collarbone, and when it shortens on one side, it pulls the skull into that posture.
You may also be able to feel a firm pea-to-grape sized lump in the muscle on the tight side. It sits under the skin in the belly of the SCM, often noticeable from a few weeks old. This is called an SCM pseudotumour or fibromatosis colli — and despite the alarming name, it is not a true tumour. It is a localised area of fibrous tissue that softens and resolves with stretching over weeks to months. It shows up in roughly half of torticollis cases.
Why It Happens
The most common picture is mechanical: a baby positioned awkwardly in the uterus for a long time (especially in late pregnancy when space is tight) or a difficult delivery — particularly instrumental births and prolonged second stages — produces compression and a small bleed or area of ischaemia in the SCM. As that heals, fibrous tissue forms, the muscle shortens, and the head pulls toward that side.
Other causes exist and matter when the picture is atypical:
- Ocular torticollis — a squint causing the baby to tilt their head to keep the eyes aligned. Onset is usually a bit later, and the tilt depends on which way they are looking.
- Cervical spine anomalies (rare; for example Klippel-Feil), which produce stiffness rather than a tight muscle.
- Acquired torticollis — sudden onset in an older baby or toddler, often with pain, after a viral illness or minor neck trauma. This is a different problem and needs same-day review.
- Neurological causes, very rare in infants.
If the head tilt is sudden, painful, accompanied by fever, or the baby looks generally unwell, that is not congenital muscular torticollis and warrants urgent assessment.
What Often Comes With It
Two cosmetic changes are common when torticollis goes untreated:
- Positional plagiocephaly. A baby who can only comfortably turn their head one way spends most of their cot time pressing the same point of skull against the mattress, and the soft infant skull flattens there. This is the same flat-spot problem as in other cases of plagiocephaly, but the asymmetry can be marked when it is driven by a fixed neck preference.
- Facial asymmetry. With a long-standing tilt, the developing face responds to the asymmetric mechanical forces — one eye and ear can sit slightly differently to the other side. Mild changes correct as the neck position normalises; more obvious changes are part of why early treatment matters.
Both are reasons to act early rather than wait.
What Treatment Looks Like
The mainstay is physiotherapy. A paediatric physiotherapist watches the baby, measures the deficit (how many degrees of rotation and lateral flexion are restricted), checks for the SCM lump, looks at the head shape, and teaches you a stretching programme. The exercises are gentle, take less than a minute each, and are done several times a day, ideally during nappy changes when the baby is on the back and relaxed.
Two main stretches:
- Lateral flexion stretch — gently bringing the ear on the opposite side down toward that shoulder, so the tight SCM elongates.
- Rotation stretch — turning the chin toward the side they avoid, holding briefly, repeating.
Plus everyday "environmental" stretches: position the baby in the cot so they have to turn their face the harder way to look at you, change the side you carry them on, alternate the head end of the cot week to week, encourage tummy time which strengthens neck muscles symmetrically.
Numbers worth knowing: started before 3 months, over 90 percent of cases resolve with stretching and physio alone, often within a few months. Started after 6 months, the resolution rate drops noticeably; a small minority of these older referrals end up needing Botox injections to release the muscle, or in rare cases surgical lengthening (usually around age 1 to 2 if conservative treatment has failed).
How to Get Seen
Ask your GP for a paediatric physiotherapy referral. Some community services in the UK accept self-referral — the local health visitor can tell you which applies in your area. Bring photos of the head position from a few different times if you have them; they make the pattern much clearer than a single snapshot in the clinic where the baby may turn whichever way the doctor's voice is.
If your baby has been seen for the head tilt and is "monitored" without active treatment, ask explicitly about a physiotherapy referral. Watch-and-wait is not the recommended approach — early movement gives the best outcome.
When the Picture Suggests Something Else
Get earlier or urgent review if:
- Onset is sudden in a baby who previously held their head normally.
- There is fever, neck pain, or a generally unwell-looking baby.
- The tilt is associated with abnormal eye movements or an obvious squint.
- The neck is very stiff in all directions (not just to one side).
- The lump in the neck is growing, hard, fixed, or accompanied by other lumps.
- There is no improvement at all after 8 to 12 weeks of consistent physiotherapy stretches.
Most babies with torticollis have a simple muscular problem with a simple, effective fix. The cases that go badly are almost always the ones that were watched for too long. Early eyes on it, early stretches, and most of these babies are unrecognisable in their head shape and movement by their first birthday.
Key Takeaways
If your baby's head is consistently tilted to one side and they prefer to look in one direction, the most common cause is congenital muscular torticollis — a tight sternocleidomastoid muscle on one side of the neck. Half of these babies have a small firm lump in the muscle that sounds alarming but is not a tumour. Physiotherapy and daily stretches at home resolve over 90 percent of cases when started before 3 months. The single highest-yield action is getting referred early — late referrals are the ones that occasionally end up needing surgery.
