June 2026
Torticollis Baby: Causes, Symptoms, and What Parents Should Know
Congenital muscular torticollis is the most common form of torticollis in babies, where one neck muscle is shorter and tighter than the other from birth or the first weeks of life. The muscle involved is the sternocleidomastoid (SCM), which runs along the side of the neck. Because it is tight on one side, the baby's head tilts toward that side while the chin turns the other way. The reassuring part: congenital muscular torticollis responds very well to early physiotherapy and positioning, and the large majority of babies recover fully without surgery. This article explains what sets the congenital form apart, what the neck lump is, and how treatment works step by step.
What is congenital muscular torticollis?
Congenital muscular torticollis, often shortened to CMT, is a tightening of the sternocleidomastoid muscle that is present at or shortly after birth. The word "congenital" means present from birth, and "muscular" points to the muscle as the source, which is what separates it from other, rarer causes of a head tilt. In congenital torticollis the muscle is genuinely shortened, sometimes with reduced blood flow to part of the muscle, rather than the baby simply having a positional preference. Clinicians often describe three types, from most to least involved: the sternomastoid tumour type, where a firm lump can be felt in the muscle; the muscular type, where the muscle is tight and shortened without a clear lump; and the postural type, the mildest, where the baby holds a strong head preference but the muscle has little or no tightness. This is why congenital muscular torticollis usually needs active treatment rather than time alone.
What causes congenital muscular torticollis?
The most common cause of congenital muscular torticollis is the position the baby held in the womb. When space is limited, the head can stay turned the same way for weeks, which keeps the sternocleidomastoid muscle short and tight. A difficult or assisted delivery can occasionally add muscle strain. In some babies, reduced blood flow to part of the muscle during this period leads the tissue to react and form the lump described below. Congenital muscular torticollis is not caused by parenting or by how you lay your baby down to sleep. It starts before birth, from a combination of position and muscle development.
The lump in the neck, explained
One feature that sets congenital muscular torticollis apart is a firm lump that can appear in the side of the neck, usually around three weeks after birth. This lump, medically called fibromatosis colli or a sternomastoid tumour, sits in the middle of the tight muscle. The word "tumour" sounds alarming, but it is benign and simply reflects the body repairing the affected part of the muscle. The baby tilts the head toward that side because it is more comfortable while the muscle heals. In most babies the lump gradually softens and disappears over the following months as the muscle recovers.
Congenital muscular torticollis and flat head syndrome
Congenital muscular torticollis and positional plagiocephaly very often appear together. Because the baby keeps the head turned to one side, pressure lands repeatedly on the same area of the soft skull, which can lead to flat head syndrome. The neck drives the position, and the position shapes the head. This does not mean something serious is happening, but it is a strong reason to keep an eye on head shape from the start. Many therapists now measure head shape with the Skully Care app, which is also available to parents at a reasonable price. Clear output values show whether the shape is within the normal range or becoming flatter on one side, and repeating the scan every few weeks shows whether things are moving in the right direction.
How congenital muscular torticollis is diagnosed
Doctors and pediatric physiotherapists diagnose congenital muscular torticollis in infants through a physical and movement examination, and in most cases no scans are needed. They watch how easily the baby turns the head in both directions, check for a head tilt, and feel the muscle for tightness or a lump. Because the congenital form is sometimes linked with hip issues, a doctor may also check the hips. If the head tilt does not fit a muscular cause, or other unusual signs are present, further tests can rule out rarer conditions. The aim is to confirm that the tightness is muscular and to track the head shape alongside it.
Congenital muscular torticollis treatment
The first-line treatment for congenital muscular torticollis is early physiotherapy combined with positioning at home, and it works very well when it starts early. A pediatric physiotherapist guides gentle stretching that gradually lengthens the tight muscle, performed several times a day during play rather than forced. Alongside this, side lying during awake time is highly valuable: it relaxes the affected muscle, improves comfort, and takes pressure off the back of the head, which lowers the chance of flattening. Because of the risk of SIDS, only use side lying while the baby is awake and supervised, and alternate sides. Short, frequent tummy time strengthens the neck and encourages free head movement. Therapists usually follow a baby with the congenital form until around one year of age, because during healing the muscle fibres can occasionally change and become more like scar tissue. In the small number of cases where the muscle stays very tight and the tilt does not improve, a specialist may consider minor surgery to release the muscle, but this is rare.
What not to do
Do not force your baby's head into a position they resist, and avoid sudden or forceful movements, as these cause discomfort and do not speed recovery. Try not to let your baby spend long stretches locked in the preferred position while sleeping or sitting in containers such as swings and car seats. If you can feel a lump in the neck, do not massage it firmly or try to press it away; instead, consult a pediatric physiotherapist and start placing your baby on the non-preferred side during awake time. Gentle, consistent, and guided is what works.
When to seek help, and will it go away?
Most babies with congenital muscular torticollis improve steadily with early stretching and positioning, and many recover within several months. It is worth seeking evaluation if your baby cannot turn the head comfortably in one direction by around four to six weeks, if the tilt stays fixed without improvement, or if the lump or stiffness seems to be increasing rather than easing. Can congenital muscular torticollis be cured? In the great majority of cases, yes, with conservative care, especially when it is caught early. The earlier movement and positioning begin, the smoother the recovery tends to be.
Common questions parents ask
What is congenital muscular torticollis?
It is a head tilt present from birth or the first weeks, caused by a shortened, tight sternocleidomastoid muscle on one side of the neck.
What is the lump in my baby's neck?
It is called fibromatosis colli, a benign thickening in the healing muscle that usually appears around three weeks and softens over the following months.
What causes congenital muscular torticollis?
Most often the baby's position in the womb, which kept the neck muscle short and tight, sometimes with reduced blood flow to part of the muscle.
How is congenital muscular torticollis treated?
With early physiotherapy, gentle stretching, supervised side lying during awake time, and tummy time. Surgery is rarely needed.
Can congenital muscular torticollis be cured?
Yes, the large majority of babies recover fully with early, consistent conservative care.
Is it the same as spasmodic torticollis?
No. Spasmodic torticollis is a different condition seen in adults and is not related to the congenital muscular form in babies.
Written by Elly van der Grift
Elly van der Grift is the co-founder of Skully Care and a pediatric physiotherapist with over 30 years of experience. Her mission is to provide top care for babies with skull deformities. With her infectious enthusiasm, she shares simple, effective tips that can make a big difference for your baby. Working with Elly, you’ll feel confident and supported in your baby’s journey to better health.