Tongue-tie in babies and breastfeeding: what you really need to know

When breastfeeding is painful, difficult or exhausting, tongue-tie is sometimes mentioned as a possible cause. But between overdiagnosis, conflicting information and parental worry, it is not always easy to see clearly. Here is a practical guide to understanding the link between tongue-tie and breastfeeding, recognising the signs that should raise concern, and knowing who to turn to.

A visible tongue-tie is not automatically a problem. All babies have a lingual frenulum, and its mere presence does not generally justify any intervention. What matters most is the functional impact: does the tongue move freely enough to allow effective and comfortable feeding? That is the question that should guide any assessment.

Key takeaways

A tongue-tie is only a concern if it genuinely restricts tongue movement and interferes with feeding.

Nipple pain, a poor latch, endless feeding sessions or insufficient weight gain can all point towards this possibility.

Before any decision is made, a thorough assessment of breastfeeding is essential, as other causes are far more common.

Surgery is not automatic: it should always be discussed on a case-by-case basis, following proper support and a rigorous evaluation.

If in doubt, it is best to seek the opinion of a professional trained in breastfeeding and infant sucking.

Tongue-tie: what exactly are we talking about?

The lingual frenulum is a thin band of tissue situated beneath the tongue, connecting it to the floor of the mouth. This structure is entirely normal. Ankyloglossia is the term used when this frenulum is too short, too thick or too fibrous, to the point of restricting tongue movement. In a young baby, this restriction can sometimes complicate breastfeeding, particularly when the tongue cannot position itself properly around the nipple.

Recent guidelines do, however, stress a fundamental point: there is no universally agreed anatomical definition of a "restrictive frenulum", and the diagnosis must be primarily functional — not merely visual. In short, seeing a frenulum is not enough to conclude that intervention is necessary.

What signs might suggest a tongue-tie during breastfeeding?

Certain signs may attract attention: baby has difficulty latching on, frequently lets go, makes clicking sounds, seems to feed for a long time without being truly effective, tires at the breast, or gains weight too slowly. On the mother's side, sore or damaged nipples that look compressed after a feed may be observed, along with an increased risk of engorgement or mastitis when milk drainage is insufficient.

The CHU de Lyon also points out that the tongue normally plays a protective and sealing role around the nipple. If its movement is restricted, feeding may be less effective, sessions longer, and breastfeeding can become painful or discouraging.

A word of caution: not all breastfeeding difficulties come from a tongue-tie

This is an essential point for parents. The Société Française de Pédiatrie reminds us that tongue-tie is far from being the most common cause of maternal pain or breastfeeding difficulties. A poor feeding position, an ineffective latch, a milk flow that is difficult to manage, certain orofacial tensions or simply a difficult start can all explain the same symptoms.

That is why a simple inspection of baby's mouth is not enough. Before drawing any conclusions, a full clinical assessment of the child's sucking ability and maternal comfort is needed — ideally carried out by a qualified breastfeeding professional.

What to do first if you suspect a tongue-tie?

The first step is not necessarily surgical. It is often helpful to begin with breastfeeding support: checking baby's position, improving the latch, observing the sucking, supporting milk production if needed and monitoring weight gain. La Leche League points out that some babies feed more effectively after optimising positioning and attachment, without any immediate procedure.

If baby is not transferring enough milk, it may also be necessary to express milk to maintain supply while waiting for a more thorough assessment. The most important thing is not to face the pain or exhaustion alone.

Is it always necessary to cut a tongue-tie?

No. In the absence of difficulties, the presence of a short or thick frenulum is not a surgical indication. French learned societies caution against the rise in unjustified frenotomies and stress that this procedure should remain exceptional — performed only after conservative measures have failed and only when an anteriorly short and/or thick lingual frenulum is genuinely interfering with sucking.

The HUG also point out that solid scientific evidence is limited and that, in the few robust studies available, the improvement observed relates mainly to breastfeeding-related pain, without strong evidence of a significant and lasting benefit on milk transfer at the breast in all cases.

If an intervention is proposed, what should you know?

A frenotomy involves dividing the frenulum when it is considered responsible for a significant functional restriction. Depending on the situation, this procedure can be quick and allow feeding to resume immediately. However, it is not a trivial act: parents must be informed of the benefit-risk balance, the possible side effects, the risk of recurrence, and the fact that no procedure alone guarantees the complete resolution of breastfeeding difficulties.

Reported complications include bleeding, tissue damage, transient feeding difficulties, oral aversion and infection. French guidelines also specify that there is no evidence showing the superiority of laser over scissors, nor any demonstrated benefit from systematic intraoral exercises after the procedure.

When to seek help quickly?

If feeds are very painful despite adjustments to position

If baby falls asleep quickly at the breast, seems frustrated or is not gaining enough weight

If you notice damaged, cracked or blanched nipples after feeds

If you have repeated engorgements, blocked ducts or mastitis

If you feel exhausted, disheartened or close to stopping breastfeeding against your wishes

In these situations, it is appropriate to consult a midwife, an IBCLC lactation consultant, a paediatrician or a doctor trained in infant sucking disorders.

FAQ

Final thoughts

The subject of tongue-tie deserves to be approached with nuance. Yes, a restrictive frenulum can sometimes interfere with breastfeeding. But no — not every instance of pain, every latch difficulty or every visible frenulum requires intervention.

What is most helpful is usually a thorough, human and individualised assessment of baby and mother's situation. When the indication is properly established, decisions are made more calmly, more appropriately, and above all with greater respect for the mother-baby relationship.

This article is intended for informational purposes only and does not replace medical advice. If you are experiencing significant pain, have concerns about weight gain or persistent breastfeeding difficulties, please seek prompt advice from a healthcare professional.