For midwives, lactation consultants, GPs, paediatricians, speech pathologists, occupational therapists, dentists and orofacial myofunctional therapists.
Tongue dysfunction does not stay in one form. It changes with age and with demand, and it often becomes less visible over time — not because the problem has resolved, but because the child has found another way to cope.
That is the question worth holding onto: when a child appears to be coping, has function improved, or has compensation simply become more effective?
Each discipline sees a different part of the same child. A midwife sees the first feed. A lactation consultant sees transfer, pain and supply. A paediatrician sees growth, sleep and milestones. A speech pathologist sees articulation and whether therapy is progressing. A dentist sees oral posture, arch form and function over time. Individually those signs are easy to explain away. Together they often tell a clearer story.
The referral framework: three domains, three concerns
You do not need diagnostic certainty to refer. You need a cluster.
Domain 1 — Appearance. What you can see. A heart-shaped or notched tip, a visible web, limited free tongue, attachment close to the tip or the gum ridge.
Domain 2 — Function. What you can assess. Can the child elevate with the mouth less than half open? Can they lateralise to both sides? Can they touch the spot behind the upper incisors?
Domain 3 — Parent report. What the family is telling you. Feeding difficulty, clicking, maternal nipple pain, slow progress with solids, speech concerns, drooling.
Three or more concerns across any combination of these domains warrants referral for a full functional assessment.
Two myths that delay referral
“The grade tells you how severe it is.” It does not. Anatomical grade does not equal functional severity. A small anterior tie can cause complete breastfeeding failure; a higher-grade posterior tie may have minimal impact in another child. Anatomy tells you what is there; function tells you whether it matters.
“If the child can stick their tongue out, it isn’t a tie.” This is the most damaging misconception in the field. Protrusion is among the least functionally relevant movements. Elevation — mid-posterior rise to create vacuum — is what feeding depends on, and it is independent of protrusion.
What you feel, not what you see
Anterior ties are visible and straightforward to identify on inspection. Posterior and submucosal restrictions are a different matter — extension may be normal, the tongue may look unremarkable, and it is elevation that is restricted.
The frenulum is not a simple midline string. Histological work published by Mills, Pransky, Geddes and colleagues in Clinical Anatomy (2019) describes it as a fascial diaphragm — a broad midline fold that inserts around the inner arc of the mandible — rather than a simple string under the tongue. Because it is fascial rather than purely mucosal, composition varies widely, and visual inspection can look entirely normal while palpation reveals significant restriction.
A tight band on palpation that is invisible on inspection is a posterior tie. If you are not palpating the floor of the mouth, the assessment is not complete.
What to look for, by window
Birth to six weeks — midwives, IBCLCs, GPs. Clicking, dribbling, poor or slipping latch, very long feeds, poor transfer. On the maternal side: nipple pain and damage, a compressed or distorted nipple shape after feeds, blanching, falling supply. Nipple compression and blanching is a high-specificity sign — it suggests the tongue has compensated by clamping because it could not generate negative pressure. The mother is part of the clinical picture, not separate from it.
The six and eight week check — GPs, paediatricians. This is the most commonly missed window, because by now the feeding crisis has often resolved onto formula and every metric looks reassuring. Weight gain on formula does not rule out a restriction; it removes the symptom everyone was watching. The tongue has not changed.
Six months to two years — GPs, paediatricians, IBCLCs. Gagging across textures, restriction to purees, drooling, disrupted sleep. A tongue that cannot lateralise cannot move food to the molars or form a bolus. “Fussy eater” and “texture aversion” are not personality traits — they are frequently oral motor signs, and they earn a look.
Two to five years — speech pathologists, paediatricians. Articulation errors involving sounds that require precise tongue-tip placement and elevation. Where progress on these plateaus despite months of targeted therapy, that is a flag to assess tongue movement rather than intensify the drill. Watch for jaw substitution and lip recruitment developing as compensatory strategies.
This window is also the most clinically awkward: often too old for a simple in-room release, and too young to cooperate with awake functional release and active post-operative rehabilitation. That is an argument for active myofunctional and feeding support during this period, not for doing nothing.
School age and adolescence — GPs, paediatricians, school health, dentists. Mouth breathing and open-mouth resting posture, snoring or restless sleep, a high or narrow palate, persisting speech errors, dental crowding and early orthodontic concern. Where orthodontic treatment is being planned, tongue posture is worth considering alongside it rather than instead of it.
Compensation versus adaptation
This distinction is worth holding across disciplines.
Adaptation means the tongue genuinely gains function — the underlying problem is addressed.
Compensation means the jaw, lips and cheeks take over to mask the restriction. It looks like coping, but the pattern hardens, becomes learned, and becomes the child’s only available strategy.
Every month of compensation is a month of entrenched motor pattern that later therapy or post-surgical rehabilitation has to unpick.
It is not always a tongue tie
Anything that prevents the tongue resting on the palate can produce a similar picture: mouth breathing secondary to adenoid hypertrophy, chronic nasal obstruction, allergic rhinitis, low muscle tone, structural palate differences, neurological differences.
A child mouth breathing because of adenoids needs an ENT opinion, not a frenectomy. Part of the value of a functional assessment is distinguishing what is actually driving the dysfunction — and saying so when a tie is not the answer.
A note on lip ties
Lip ties are approached conservatively. There is currently no evidence that releasing a lip tie in infancy prevents diastema, and they are not released routinely.
Lip ties are assessed in consultation with the allied health professional involved in the child’s care rather than in isolation — commonly an IBCLC for an infant, and a myofunctional therapist or speech pathologist for an older child, either of whom may be the first to raise the concern. If you are supporting a child where lip function looks restricted, that observation is exactly what we want to see in a referral. Appearance alone is not a basis for assessment or treatment.
What happens when you refer
A referral letter from any GP or allied health discipline is all that is needed; families can also book directly. Assessment includes history, functional examination with palpation, validated measures of tongue range of motion and, where indicated, validated screening for sleep-disordered breathing, plus feeding observation where relevant.
Where treatment is indicated, the plan is therapy before, release, therapy after — a release alone does not restore function. Where treatment is not indicated, we say so.
You will receive written communication on findings and the proposed plan, and again after any treatment. We aim to keep you involved rather than take over the child’s care.
Assessments are with Dr Helen Fung. The team will arrange a suitable appointment time with the family.
A note on clinical discernment
The evidence base in this field is uneven, enthusiasm has in places outrun data, and surgical rates in some communities are difficult to justify. Healthy scepticism is a prerequisite for good diagnosis, not an obstacle to it.
Equally, inaction is not neutral. Where a functional problem is present, watching and waiting without support is itself a choice with consequences — for the baby, for the mother and for the family.
The aim is functionally driven assessment, conservative decision-making, multidisciplinary support and honest conversations with families.
One action, whatever your discipline
Midwives and IBCLCs: palpate the floor of the mouth. Every painful or clicking feed earns a feel, not just a look.
GPs and paediatricians: weight gain is not a tongue examination. Look anyway, at every developmental check.
Speech pathologists: where progress on tongue-tip and elevation sounds has plateaued despite months of targeted work, assess tongue movement.
Dentists and myofunctional therapists: read the palate and the airway. A narrow arch in a mouth breather is a tongue posture story as well as an orthodontic one.
Everyone: three or more concerns across appearance, function or parent report — refer. You do not need certainty. You need a cluster.
To refer
Send a referral letter, or contact the team to discuss a patient. See also our tongue and lip tie service page.