Parents may notice in the first weeks or months of life that their baby consistently holds their head tilted to one side, turns their head preferentially in one direction, or shows a visible or palpable lump in the side of their neck. This presentation — torticollis — is worth taking seriously and having assessed early, because physiotherapy intervention started in the first few months of life produces much better outcomes than treatment initiated later.
Healthbooq supports parents with guidance on common musculoskeletal presentations in infancy, including when to seek assessment and what to expect from treatment.
What Torticollis Is
The word torticollis means "twisted neck" (from the Latin tortus, twisted, and collum, neck). Congenital muscular torticollis results from tightening, shortening, or fibrosis of the sternocleidomastoid (SCM) muscle — the large muscle running diagonally from behind the ear to the collarbone on each side of the neck. When the SCM on one side is shortened or tight, it pulls the head into a characteristic posture: tilted toward the affected side (the ear moves toward the shoulder on the same side) and rotated away from it (the chin turns toward the opposite shoulder).
A palpable firm mass or thickening within the SCM muscle is present in approximately half of affected infants; this is SCM fibromatosis or SCM pseudotumour. Despite its alarming name, this is not a true tumour and resolves with physiotherapy in the great majority of cases.
Causes
The cause of congenital muscular torticollis is not definitively established but is believed to involve a combination of intra-uterine positioning (prolonged compression of the SCM in a cramped uterine environment), birth trauma (particularly from difficult deliveries involving instrumental delivery or prolonged labour), and localised ischaemia with subsequent fibrosis within the SCM muscle.
Torticollis may also arise from other causes — ocular (a squint causing head tilt to align the visual axes), bony (cervical spine abnormality), neurological, or in response to local infection or inflammation — and these should be considered if the torticollis develops suddenly, is associated with other symptoms, or does not respond to physiotherapy.
Associated Findings
Plagiocephaly — asymmetric skull flattening — is common in babies with torticollis. The mechanism is positional: a baby who consistently lies with the head turned to one side (because rotation away from the tight side is limited) places repetitive pressure on the same part of the skull, which is soft and mouldable in infancy. Plagiocephaly associated with torticollis typically improves as the torticollis is treated and the baby's head position becomes more symmetrical.
A facial asymmetry may also be present if the torticollis is long-standing and uncorrected, as the asymmetric head position affects the mechanical forces on the developing facial skeleton.
Treatment
Physiotherapy is the primary treatment for congenital muscular torticollis and is effective in the great majority of cases when initiated early. The physiotherapist will assess the range of neck movement, identify the degree of SCM tightness, and instruct parents in stretching exercises to perform several times daily at home. These exercises gently stretch the SCM on the affected side by moving the head into the direction of rotation and lateral flexion opposite to the restricted direction.
Early physiotherapy referral — ideally within the first three months of life — is associated with resolution rates of over ninety per cent with conservative management. Referral at six months or later is associated with lower rates of complete resolution with stretching alone, and a minority of cases presenting late or not responding to physiotherapy require surgical intervention.
Parents can make an appointment with their GP to request physiotherapy referral; some community physiotherapy services accept self-referral.
When to Seek Assessment
Any baby who consistently holds their head tilted to one side, shows a preference for looking in one direction, or has a palpable neck mass should be reviewed by a GP, who will assess the baby, confirm the diagnosis, and arrange physiotherapy referral. The earlier the referral, the better the prognosis for conservative management.
Key Takeaways
Congenital muscular torticollis — tightening or shortening of the sternocleidomastoid (SCM) muscle on one side of the neck — is the most common cause of persistent head tilt in infants, causing the baby to hold their head tilted toward the affected side and the chin turned away from it. It is most commonly caused by birth trauma, intra-uterine positioning, or fibrosis within the SCM muscle. The condition is treatable with physiotherapy and stretching exercises in the great majority of cases; early physiotherapy referral produces better outcomes than late referral. Secondary plagiocephaly (flattening of the skull on the same side) is a common associated finding.
