Signs of Tongue-Tie in Children

Medically reviewed by Dr. Sara Stock, DDS. Last updated: August 2026.

The signs of tongue-tie in children that parents notice first are rarely the ones in the textbooks. Feeding that takes too long or makes a clicking sound in infancy. A toddler who gags on textures other children manage. A school-age child who sleeps with their mouth open, snores, and wakes as tired as they went to bed. The tongue cannot reach the roof of the mouth or past the lower lip. Parents usually observe several of these long before anyone gives the pattern a name.

What Is Tongue-Tie?

Tongue-tie, clinically ankyloglossia, is a restrictive band of tissue under the tongue that limits how far and how freely the tongue can move. The band, the lingual frenulum, is present in everyone. It becomes a tie when it is short, thick or attached far enough forward that it restricts elevation, extension or lateral movement.

Lip-tie is the equivalent restriction of the band between the upper lip and the gum, and the two frequently occur together. Both are congenital, both vary enormously in severity, and both are commonly missed at routine checkups because a quick look inside the mouth does not test function.

That is the crux of it. Tongue-tie is diagnosed by what the tongue can do, not by how the frenulum looks. A child whose tongue cannot reach the palate has a functional restriction whether or not the band looks dramatic.

The Signs, by Age

Print this section and take it to your pediatrician if any of it sounds familiar.

Infants

Difficulty latching or maintaining a latch. A clicking sound during feeding. Feeds that take much longer than expected or leave the baby unsatisfied. Slow weight gain. Maternal nipple pain or damage that persists despite good positioning. Falling asleep quickly at the breast from effort rather than fullness.

Toddlers

Picky eating that centres on textures rather than flavours, particularly foods that need to be moved around the mouth. Speech sounds that do not develop on schedule, especially those requiring tongue elevation. Persistent drooling beyond the usual age. Difficulty licking an ice cream or clearing food from around the teeth.

School Age

Mouth breathing during the day and, more tellingly, at night. Snoring. Restless sleep with unusual positions and heavy sweating. Dark circles under the eyes. Crowded teeth and a narrow upper arch. Difficulty concentrating, irritability, or behaviour that has been attributed to attention problems.

Any Age

The tongue cannot reach the roof of the mouth with the mouth open, or cannot extend past the lower lip. The tongue tip looks heart-shaped or notched when the child tries to stick it out. These two observations are the ones most worth checking at home.

Why Tongue-Tie Affects More Than Speech

Most parents associate tongue-tie with feeding and speech. The larger consequence is structural, and it unfolds over years.

The tongue is the natural scaffold for the upper jaw. At rest, it should sit against the palate, applying gentle outward pressure that helps the maxilla develop to its full width. A restricted tongue cannot maintain that position, so it rests low in the mouth instead, and the developing arch loses its principal shaping influence.

A low tongue posture also makes nasal breathing harder to sustain, so the child becomes a habitual mouth breather. Research on craniofacial development in children with sleep-disordered breathing describes the association between mouth breathing, adenotonsillar hypertrophy and altered facial growth.

A narrower arch means less room in two places at once: less room for the adult teeth, which crowd, and less room in the nasal airway above, which narrows. During sleep, when muscle tone falls, that narrower airway is more prone to collapse. This is why crowded teeth and poor sleep so often turn out to be the same problem viewed from different angles.

How Tongue-Tie Is Assessed

Assessment is functional. We look at how far the tongue can elevate with the mouth open, whether it can sweep the palate, how it moves laterally, and where the frenulum attaches. In infants, the assessment includes observing a feed where possible. In older children it includes resting tongue posture, speech sounds and the shape of the palate.

Crucially, we also assess what the restriction has already done: arch width, crowding, the position of the lower jaw, tonsil size and whether the child breathes through the nose at rest. Those findings determine whether releasing the tie alone would achieve anything useful.

How Tongue-Tie Is Evaluated at Smile Brookline, and When a Release Is Referred Out

Tongue-tie evaluation happens here, in house, as part of the airway and orthodontic assessment during the $195 airway exam. What we do not do here is the release procedure itself: frenectomy is performed by a trusted referral partner, and we coordinate that appointment and the follow-up.

We are explicit about that division because it affects your planning. You will not be sold a procedure by the person who diagnosed the need for it, and you will get an honest answer about whether release is indicated at all. Many children with mild restriction do not need one.

The Role of Myofunctional Exercises Afterwards

Release creates the potential for better tongue movement. It does not teach the tongue to use it. Without retraining, the tongue frequently returns to its old low resting posture and the functional gain is lost, which is one reason release alone sometimes disappoints.

We refer to MyoSync, a Vivos-aligned telehealth service, so families can complete orofacial myofunctional therapy from home rather than adding another weekly appointment to the schedule. Where arch development is also needed, that runs alongside through our tongue-tie evaluation in Brookline, MA and pediatric airway programme.

When to Act and When to Wait

Act promptly in infancy where feeding is genuinely compromised, because the window for establishing breastfeeding is short. Cochrane and other reviews of frenotomy for tongue-tie in newborns have examined outcomes for breastfeeding, and the evidence supports intervention in symptomatic cases.

In older children, the question is different: what is the restriction currently costing, and what will it cost if left. A child who breathes through their nose, sleeps well and has an adequately wide arch may need nothing. A child who mouth breathes, snores and has a narrow palate is on a trajectory worth interrupting while growth can still be guided.

Waiting has a real cost in this second group, because jaw development does not pause while a decision is made. Untreated childhood airway problems also do not reliably resolve at adolescence, and the adult version is treated with how untreated airway issues follow children into adulthood.

Frequently Asked Questions About Tongue-Tie in Children

What are the symptoms of tongue-tie?

In infants, difficulty latching, clicking while feeding, slow weight gain and maternal pain. In toddlers, texture-based picky eating, delayed speech sounds and drooling. In older children, mouth breathing, snoring, restless sleep and crowded teeth. At any age, a tongue that cannot reach the palate or extend past the lower lip.

What are the signs of tongue-tie?

The most reliable home checks are whether the tongue can touch the roof of the mouth with the mouth open, whether it can extend past the lower lip, and whether the tip looks heart-shaped or notched on protrusion. Function matters more than how the band looks.

How do I know if my child has tongue-tie?

You cannot confirm it at home, but you can gather useful evidence. Note feeding or speech difficulties, watch how your child sleeps and breathes, and try the two tongue movement checks above. Bring those observations, and a short phone video of your child asleep, to an airway exam.

Does tongue-tie cause mouth breathing?

It contributes. A restricted tongue cannot rest against the palate, so it sits low, which makes sustained nasal breathing harder. Mouth breathing then influences how the upper jaw develops. Enlarged tonsils and adenoids and nasal obstruction are other common contributors and should be assessed alongside.

Does tongue-tie affect speech?

It can, particularly sounds requiring tongue elevation, though many children with restriction speak normally. Where speech is affected, a speech-language pathologist should be involved alongside any dental assessment, since therapy is frequently needed regardless of whether release is performed.

At what age should tongue-tie be treated?

In infancy where feeding is compromised, promptly. In older children, the decision is based on current function and developmental trajectory rather than age alone. Assessment is worthwhile as early as concerns arise, because guided arch development works best while growth is still occurring.

Does a frenectomy hurt, and how long is recovery?

The procedure is performed by our referral partner, so recovery specifics come from them, but it is generally quick and done under local anaesthetic. Discomfort for a few days is typical, and post-release stretching exercises are usually prescribed to prevent reattachment. Myofunctional therapy follows.

Can tongue-tie cause crowded teeth?

Indirectly, yes. The tongue shapes the upper arch during growth by resting against the palate. A restricted tongue removes that influence, the arch develops narrower, and the adult teeth have less room. This is why crowding and airway problems so often appear in the same child, and why clear aligners for crowded teeth address the result rather than the cause.

Book Your Child's Airway Exam ($195) in Brookline, MA

If your child snores, breathes through their mouth or wakes unrefreshed, book the $195 airway exam with Dr. Sara Stock, DDS, a certified Vivos provider for children aged 3 to 12. Tongue-tie evaluation is included as part of the assessment. Call (617) 731-3364 or use our contact page. Families are also welcome to join a Parent Education Meeting, and further context is available on our airway dentistry at Smile Brookline hub and our snoring treatment for children and adults page.

External resources: the American Academy of Pediatrics guidance on ear, nose and throat conditions, the American Speech-Language-Hearing Association on tongue-tie, and a Cochrane review of frenotomy for tongue-tie in newborn infants (PMID: 28284020).