Does Tongue-Tie Affect Speech? What the Evidence Says

✓ Reviewed against AAP clinical report (2024), Chinnadurai et al. (2015) systematic review, ASHA, NHSEvidence level BLast reviewed October 14, 2026Published October 14, 2026

Tongue-tie (ankyloglossia) is a tight band under the tongue that can limit its movement. Parents often worry it causes speech problems, but a systematic review in Pediatrics found the data insufficient to judge whether releasing it improves outcomes other than breastfeeding. Most sound errors have other causes.

What tongue-tie is

Tongue-tie, or ankyloglossia, is a congenitally tight lingual frenulum — the band of tissue under the tongue — that limits the tongue’s motion. The American Academy of Pediatrics’ 2024 clinical report defines it this way, and focuses on infant feeding: it concludes that whether releasing a tight frenulum in newborns improves breastfeeding is not clear, and that a team approach is needed because symptoms overlap with other feeding difficulties.²

The NHS describes tongue-tie as most common in babies, notes that it may not cause any problems, and says treatment is available when it does — most often for feeding.³

What the research says about speech

The most cited evidence summary is a 2015 systematic review in Pediatrics of treatments for ankyloglossia for reasons other than breastfeeding. It found two randomized trials, two cohort studies, and eleven case series. Two cohort studies reported improved articulation and intelligibility after treatment, and many non-comparative studies reported speech benefits — but those studies mostly focused on procedures and safety rather than speech outcomes, and few followed children long-term.¹

Insufficientthe review’s verdict on data for judging the effects of frenotomy on outcomes other than breastfeeding, including speech (Chinnadurai et al., 2015).¹

It is also telling what is absent from ASHA’s consumer list of factors that can contribute to speech sound disorders: apraxia of speech, brain injury, developmental disorders, dysarthria, genetic syndromes, and hearing loss are named; tongue-tie is not. That does not mean it never matters: ASHA’s clinician guidance lists ankyloglossia among the possible structural bases an SLP checks for during an evaluation.^4,5

Most sound errors have other explanations

The sounds parents most often blame on tongue-tie — L, R, TH, and S — are also among the latest sounds to develop in every child. In US data, S and L are acquired at 4;0–4;11, R at 5;0–5;11, and voiceless TH at 6;0–6;11 (90% criterion). An error on one of these sounds in a 4-year-old is usually development, not anatomy.⁶

Free Speech Milestone Checker

Check whether your child’s sounds are on track for their age — in 2 minutes.

Try it free →

What to do if you are worried

1Ask a speech-language pathologist to assess the speech errors and how your child’s tongue moves during speech — not just how it looks at rest.
2Talk to your pediatrician or an ENT about the frenulum itself, especially if there are feeding concerns.
3Decide together, with the speech assessment in hand. A procedure is less likely to help if the errors are typical for your child’s age.
4Skip tongue “workouts.” A systematic review found insufficient evidence that nonspeech oral motor exercises change speech.

This is exactly what an SLP evaluation covers. ASHA’s Practice Portal describes an oral mechanism examination of the structure and function of the speech mechanism, and an orofacial examination to identify possible structural bases for speech sound disorders — naming ankyloglossia alongside submucous cleft palate and malocclusion. The oral-motor finding comes from a 15-study systematic review.^5,7

The AAP encourages parents to learn developmental milestones and raise concerns with their pediatrician. To find a certified SLP, use ASHA’s ProFind directory.^8,9

Frequently asked questions

Does tongue-tie cause speech problems?＋

It can restrict tongue movement, and parents often link it to speech, but the evidence is limited. A systematic review in Pediatrics found that data were insufficient for assessing the effects of frenotomy (tongue-tie release) on outcomes other than breastfeeding, including speech. Two cohort studies reported improved articulation after treatment, but few studies looked at longer-term speech outcomes.

Should my child have tongue-tie surgery for speech?＋

That is a medical decision to make with your pediatrician or an ENT, ideally alongside a speech-language pathologist’s assessment of whether the tongue restriction is actually causing the speech errors. Because the evidence on speech outcomes is thin, an SLP evaluation first helps avoid a procedure that may not address the problem.

Can tongue-tie cause a lisp?＋

It is often suggested, but a lisp has many possible explanations and is common in typically developing children while S is still maturing — S and Z are acquired at 4;0–4;11 at the 90% criterion in US data. An SLP can look at how your child’s tongue actually moves when making S.

Is tongue-tie common?＋

The NHS describes tongue-tie as most common in babies and notes it may not cause any problems. Treatment is usually considered when it does — most often for feeding difficulties in infants.