In short
- A newborn’s cartilage is temporarily malleable, which is why it can be moulded without surgery.
- The window is measured in weeks. The evidence supports starting in the first weeks of life.
- It is not rare: in a series of 1,500 newborns, 57.5% had some abnormality of the ear.
- And many resolve on their own: in that same series, 31.6% had corrected spontaneously by one month of age.
- When it is treated, the results are good: in a series of 184 ears, 98.4% achieved complete or partial correction.
- It is not entirely harmless: the most frequent problems are minor skin problems under the device.
- It is not something to improvise at home. Holding the ear with tape or plasters can damage a newborn’s skin without correcting anything.
During the first weeks of life, the cartilage of a baby’s ear can still be moulded. With a device that holds the ear in the right position for a few weeks, many abnormalities that would need surgery in adulthood are corrected without an operation. It is one of the few things in plastic surgery where the timing matters more than the technique.
And that window is short. The largest systematic review published to date concludes that the available evidence supports starting moulding in the first weeks of life for it to be more effective. There is no exact date after which it stops working, but effectiveness falls as the cartilage loses its malleability.
That said, and before any parent takes fright: more than half of newborns have some abnormality in the shape of the ear, and a significant proportion correct on their own. The consultation is precisely for telling one case from the other.
This page sets out a non-surgical alternative to otoplasty.
Why that window exists
The cartilage of a newborn’s ear does not behave like an adult’s. During the first weeks it retains a temporary malleability, attributed to the effect of maternal hormones still circulating in the baby. That allows a gentle, sustained force — the kind a mould applies — to reorient the ear and for the new shape to become established.
Afterwards, the cartilage becomes firmer and more elastic: it springs back as soon as the pressure is removed. From then on moulding stops working and correction, if wanted, becomes surgical and is considered years later.
It is why this is one of the very few situations in which consulting early changes the whole treatment, and does not merely bring it forward.
It is not rare, and many correct on their own
There are two figures here that should be given together, because separately they either frighten or mislead.
A morphometric study of 1,500 newborns, examined in the first week of life and again at one month, found some abnormality of the ear in 57.5%. In other words: more than half of babies have an ear that is somewhat folded, creased or protruding at birth.
The second figure is the reassuring one: in that same group, 31.6% had corrected spontaneously by the day-30 review. And the authors themselves note that the rate of spontaneous resolution varies a great deal with the type of abnormality: they do not all behave the same.
From those two figures come the two practical conclusions:
- There is no need for alarm on seeing an oddly shaped ear in a newborn.
- Nor is it wise simply to wait, because if the abnormality is one of those that do not resolve on their own, the window for treating it without surgery closes while you wait.
The sensible course is an early assessment that says which of the two groups it belongs to.
When to start
The reference systematic review gathered 37 studies and 3,341 patients. In them, treatment began on average at 4.8 weeks of age — with a median of 3.7 and a range from 0.9 to 8.8 weeks — and lasted on average 5.1 weeks.
Its conclusion is what guides practice: the evidence supports starting moulding in the first weeks of life for it to be more effective.
A more recent series of 114 babies puts the actual start at a mean of 21 days of age, with a mean treatment duration of 40 days.
As for the device, the review found that custom-made ones — made by the doctor — were used more than commercial ones, with no difference in correction or complication rates between them. Put another way: when you start matters far more than what you use.
What results are achieved
In the series of 184 ears in 114 babies treated with a commercial moulding system, 98.4% achieved some degree of correction: complete in 67.9% and partial in 30.4%.
That breakdown is worth reading properly. “Complete correction” in two out of three, and partial improvement in almost all the rest, is a very good result for a non-surgical treatment. But partial means partial: in a proportion of cases the ear improves without being fully corrected, and that has to be said before starting, not afterwards.
What can go wrong
It is not a harmless treatment, although its complications are mild and local. In that same series:
- Eczematous dermatitis in 13.6% of ears.
- Pressure ulcers in 12.5%.
And one figure that shapes the follow-up: babies who had a complication were 3.36 times more likely to achieve only partial rather than complete correction. The reason is intuitive — a complication means removing the mould and interrupting treatment — and it is why the reviews during moulding are not a formality.
A note of caution about the quality of the evidence is also in order: the systematic review notes that only 40.5% of the studies provided long-term follow-up data. Short-term results are well documented; those years later, less so.
What moulding does not do
- It does not correct microtia or malformations in which tissue is missing. Moulding reorients what is there; it does not create what is not.
- It does not replace surgery once the window has passed. Starting late is not “better than nothing”: it is subjecting the baby to a device without the effectiveness that justifies it.
- It does not guarantee a result. Two out of three corrections are complete; the rest are partial.
And if the window has already passed
Nothing irreparable has happened: it simply means the route is different and the calendar is different. Surgical correction of prominent ears is usually considered from the age of 5 or 6, when the ear has reached almost its adult size, and with one condition we consider as important as the anatomical one: that it is the child who wants it changed.
That gives years of margin for deciding without haste, which is exactly the opposite of the situation in the first weeks of life.
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Frequently asked questions
Up to what age can a baby’s ears be moulded?
There is no exact date, but the window is measured in weeks. The evidence supports starting in the first weeks of life, and the published series begin treatment at between 3 and 5 weeks on average. The later it is, the less malleable the cartilage and the lower the effectiveness.
My baby has a folded ear — is it going to stay like that?
Not necessarily. More than half of newborns have some abnormality in the shape of the ear and around a third correct on their own during the first month. What cannot be known without assessing it is which of the two groups your baby’s ear belongs to, and that is why it is worth looking at early.
Does it hurt? Does it bother the baby?
The device is not painful, but it rests on very delicate skin. The most frequent problems are local skin problems — dermatitis and pressure rubbing — which appear in around 13% of ears treated and are the main reason for the reviews during treatment.
Can I hold the ear in place with tape at home?
No. A newborn’s skin is easily damaged and an improvised fixing does not apply the force that corrects anything. Moulding requires a proper device and review appointments; doing it at home has all the drawbacks and none of the benefits.
How long does treatment last?
Around five to six weeks on average, although it varies with the type of abnormality and the baby’s response. During that time there are reviews to check the skin and adjust the device.
Does any device work equally well?
The systematic review found no difference in correction or complications between commercial devices and those custom-made by the doctor. What is decisive is when you start, not the brand.
If it does not work completely, can surgery be done later?
Yes. A partial correction does not rule out an otoplasty later, considered from the age of 5 or 6. In many cases it also leaves less to correct.
Sources
- Sulibhavi A, Reddy SP, Butts SC, Schmalbach CE. Ear Molding in Children—Timing, Technique, and Follow-up: A Systematic Review. Facial Plast Surg Aesthet Med. 2024;26(6):730-739. PMID 38963392 — 37 studies and 3,341 patients: mean start at 4.8 weeks (median 3.7; range 0.9–8.8), mean duration 5.1 weeks, no difference between commercial and custom-made devices, and the conclusion that the evidence supports starting moulding in the first weeks of life. Only 40.5% of the studies provided long-term follow-up.
- Zhao H, Ma L, Qi X, et al. A Morphometric Study of the Newborn Ear and an Analysis of Factors Related to Congenital Auricular Deformities. Plast Reconstr Surg. 2017;140(1):147-155. PMID 28654602 — 1,500 newborns examined in the first week and again at one month: an incidence of ear abnormality of 57.46% and spontaneous resolution of 31.55% at 30 days, with notable differences between types of abnormality.
- Sayadi JJ, Arora JS, Chattopadhyay A, Hopkins E, Quiter A, Khosla RK. A Retrospective Review of Outcomes and Complications after Infant Ear Molding at a Single Institution. Plast Reconstr Surg Glob Open. 2023;11(8):e5133. PMID 37636327 — 184 ears in 114 babies: start at a mean of 21 days and 40 days of treatment; complete correction in 67.9% and partial in 30.4% (98.4% in total); eczematous dermatitis in 13.6% and pressure ulcers in 12.5%; those who had a complication were 3.36 times more likely to achieve only partial correction.
- Pawar SS, Koch CA, Murakami C. Treatment of Prominent Ears and Otoplasty: A Contemporary Review. JAMA Facial Plast Surg. 2015;17(6):449-454. PMID 26158729 — prominent ears affect approximately 5% of the population; a review of how the techniques have evolved, from non-surgical newborn moulding to cartilage-sparing surgical techniques.
Sources checked one by one against PubMed on 13 August 2026.
Book your consultation
If your baby was born a few weeks ago and their ear is not the usual shape, what decides the treatment is the calendar. At the Instituto de Cirugía Plástica del Mediterráneo, in Valencia, we assess whether this is one of the abnormalities that correct on their own or one that is worth moulding, and we say so clearly — including the option of waiting and reviewing.
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Information reviewed by Dr Elena García Vilariño, registration no. 46/4624503, and Dr Enrique Salmerón González, registration no. 46/4624077, specialists in Plastic, Aesthetic and Reconstructive Surgery. Assessing a newborn’s ear requires an in-person examination; this information does not replace a medical consultation.
Registration no. 46/4624077
Registration no. 46/4624503
Last reviewed: 6 September 2026. This content is for information only and does not replace an individual assessment by a healthcare professional.
