When feeding doesn't feel right: Looking beyond tongue-tie

Feeding difficulties can look very different from one baby to another. A baby may have very short and frequent feeds, feed for a long time, repeatedly slip off the breast, become unsettled during feeds, or leave a caregiver experiencing ongoing pain. Bottle-feeding families may notice tiring or prolonged feeds, milk leaking, clicking, coughing, difficulty maintaining a comfortable seal or a baby who seems to struggle to coordinate feeding.

These experiences can occur with breastfeeding, bottle feeding or combination feeding, and the same underlying factor does not necessarily explain every feeding difficulty.

When feeding isn't going well, it can be tempting to look for one explanation. If a frenulum is noticed under the baby's tongue, tongue-tie may quickly become part of that conversation. Sometimes restricted tongue function is relevant to feeding, while at other times another factor may be contributing, or several things may be happening together.

Looking beyond tongue-tie does not mean dismissing it. It means making sure that the whole feeding picture is considered.

A feeding difficulty is not a diagnosis

A feeding difficulty describes what is happening; it does not, by itself, tell us why it is happening.

A baby who feeds for a long time may be experiencing difficulty maintaining an effective seal, but long feeds can also occur for other reasons. A baby who feeds very frequently may have difficulty transferring milk, but frequent feeding can also be completely appropriate at certain stages of infancy. Clicking can occur with changes in positioning or attachment, milk flow, oral coordination or other factors, and not every baby who clicks has a tongue-tie.

The same applies to bottle feeding. Dribbling, coughing, milk loss, tiring, prolonged feeds or difficulty maintaining a seal may have several possible explanations.

This is why a feeding assessment needs to look beyond a single symptom or a single anatomical finding. The current UK Infant Feeding Survey found that feeding difficulties are varied, with mothers reporting problems including reflux, colic or wind, breast or nipple discomfort, difficulty with latching, milk supply concerns, positioning difficulties and bottle-feeding difficulties.

There are many possible contributors

There are far more possible contributors to feeding difficulties than can reasonably be listed in one article, so the examples below are intended to illustrate the breadth of the feeding picture rather than provide an exhaustive list.

Some factors may be temporary. Others may have been present from the beginning. Some may affect feeding directly, while others may influence how a baby approaches feeding or how easily they can coordinate the different movements involved.

And sometimes more than one factor is present.

Positioning and attachment

For breastfeeding, positioning and attachment can make a substantial difference to how comfortably and effectively a baby feeds. A baby may appear to be attached while still having a shallow or unstable attachment, and this can contribute to nipple pain, slipping on and off the breast, clicking or concerns about milk transfer.

Breastfeeding is also different from simply feeding from a nipple.

The aim is not for a baby to draw only the nipple into the mouth in the way a bottle teat is drawn into the mouth. Effective breastfeeding involves a deeper attachment to the breast tissue, with the nipple drawn into the baby's mouth as part of that attachment.

This distinction matters because nipple shape alone does not determine whether breastfeeding will be successful. Babies can breastfeed effectively with inverted or less prominent nipples when they are able to attach well to the breast.

If positioning or attachment is difficult, this does not mean that tongue-tie is necessarily responsible. Equally, improving positioning and attachment does not rule out the possibility that restricted tongue function may also be contributing.

A skilled feeding assessment can help separate these possibilities rather than assuming that one explains everything.

Milk flow

Milk flow can influence how a baby feeds.

A very fast milk flow may leave a baby struggling to coordinate sucking, swallowing and breathing, while a slower flow may require a different feeding pattern. Changes in milk supply can also alter the way a baby behaves at the breast.

For breastfeeding families, milk transfer and milk production are related but are not the same thing. A concern about supply therefore deserves consideration of the whole feeding pattern rather than automatically being attributed to tongue-tie.

The NHS identifies positioning and attachment, feeding frequency, maternal and infant illness and several other factors as possible influences on milk supply, alongside restricted tongue movement in some babies.

Maternal anatomy and feeding mechanics

Maternal anatomy can form part of the feeding picture, but it is important not to suggest that a particular breast or nipple shape is inherently a problem.

Nipple pain, nipple trauma or a nipple that appears misshapen after a feed may be useful clues that the feeding mechanics are worth exploring. They do not, however, mean that the shape of the nipple itself is causing the difficulty.

Successful breastfeeding does not depend on having a particular nipple shape. What matters is how the baby attaches and feeds at the breast.

This is another reason why looking at the feeding interaction itself can be more informative than focusing on one physical feature in isolation.

Feeding coordination and developmental maturity

Feeding requires considerable coordination.

A baby has to organise sucking, swallowing and breathing while maintaining an effective seal and responding to the flow of milk. These skills develop and mature over time, and they can be influenced by gestational age, birth history, illness, neurological development, muscle tone and the baby's state at the time of feeding.

A baby who was born prematurely, for example, may have very different feeding skills from a baby of the same chronological age who was born at term.

Developmental maturity therefore needs to be considered alongside the feeding difficulty rather than assuming that every difficulty is caused by an anatomical restriction.

Nasal congestion and breathing

Babies need to coordinate breathing with feeding, and nasal congestion can make this more difficult.

A blocked or congested nose may cause a baby to pause frequently, pull away from the breast or bottle, become unsettled, feed for shorter periods or tire more easily. Respiratory illness can temporarily change feeding even when oral function has not changed.

If a baby is struggling to breathe comfortably during feeding, this needs appropriate assessment rather than being assumed to be a tongue-tie problem.

Teething and changes in the mouth

Teething can temporarily change feeding because a baby's gums and mouth may feel uncomfortable.

During effective breastfeeding, the tongue should extend forwards over the lower gumline, helping to protect the breast from direct contact with the lower teeth. When a baby is well attached and feeding effectively, the caregiver should not normally feel the teeth during active feeding (Guóth-Gumberger, 2026).

Teething can nevertheless make the baby's mouth sore, particularly when they are not actively feeding, and this may temporarily alter how readily they approach the breast or how they behave during feeds.

The presence of teeth therefore does not automatically explain nipple pain or biting during breastfeeding. If feeding has become uncomfortable, the attachment and mechanics of the feed are worth reviewing.

Illness and other medical factors

Babies may feed differently when they are unwell. Even a relatively short-lived illness can affect appetite, alertness, breathing, stamina or willingness to feed.

There can also be medical factors that are much more important to recognise.

For example, a heart murmur should never simply be dismissed as an innocent explanation for feeding difficulties. Many babies with heart murmurs do have normal hearts, but a murmur can sometimes be associated with an underlying heart problem, which is why babies with murmurs are assessed and, where necessary, followed up.

If a baby with a heart murmur is feeding poorly, becoming breathless or unusually sweaty during feeds, tiring markedly, failing to gain weight as expected, breathing unusually quickly, working harder to breathe, or developing pale, blue or mottled skin, these symptoms need medical assessment rather than being attributed to oral function. NHS guidance for families specifically advises urgent assessment when a baby with a murmur becomes unwell or develops these warning signs.

These symptoms can have causes other than heart disease, but that is precisely why they need appropriate clinical assessment.

Changes following routine immunisations

Some babies are temporarily more sleepy, unsettled or uncomfortable following routine immunisations, and feeding may change for a short period as a result.

Breastfeeding can also provide comfort during vaccination, with evidence that breastfeeding around vaccination can reduce crying and behavioural measures of pain in infants (Harrison et al., 2016).

A temporary change in feeding following an immunisation does not necessarily indicate a new problem with oral function. Routine immunisations should not be delayed simply because a baby may temporarily feed differently.

If a baby is significantly unwell following an immunisation, or a caregiver is concerned about their symptoms, appropriate medical advice should be sought.

Learned compensations

Sometimes a baby has experienced feeding difficulty for long enough that they develop learned compensations.

A baby may find another way to maintain a seal, alter the way they use their jaw, change their tongue position, take frequent pauses or develop a particular feeding pattern that allows them to manage as well as they can.

These compensations are not simply a matter of behaviour. They can become part of the baby's established feeding pattern.

If the original contributing factor changes, the learned compensation may not disappear immediately. This is one reason why feeding may remain difficult even when an underlying problem has been addressed.

It also means that continuing feeding difficulties do not automatically prove that a tongue-tie remains the problem, or that another procedure is required. The feeding pattern needs to be reassessed in its own right.

Feeding frequency does not tell the whole story

The number of feeds or the length of individual feeds can sometimes provide useful information, but neither measure can tell us on its own whether feeding is effective.

Some babies naturally feed quickly. Others take longer. Some feed frequently because they are establishing milk production or going through a period of increased demand. Others may feed frequently because they are not transferring milk efficiently or are tiring during feeds.

The same principle applies to bottle feeding. A baby who takes a long time to finish a bottle may be tired, poorly coordinated, affected by the flow rate, uncomfortable or experiencing another difficulty. A baby who takes very small amounts frequently may have a completely different reason for doing so.

The pattern needs to be considered alongside the baby's behaviour, intake, growth, output, comfort and overall wellbeing.

Sometimes several things are happening at once

This is perhaps one of the most important reasons not to search for a single explanation.

A baby may have nasal congestion at the same time as a fast milk flow. A caregiver may be experiencing nipple pain alongside positioning difficulties. A baby may be recovering from an illness while also becoming more unsettled because of disrupted sleep. A change in feeding may occur during teething. A baby may have developed learned compensations following an earlier period of feeding difficulty.

These examples are deliberately varied because feeding difficulties do not always come neatly packaged as one identifiable problem.

Sometimes there is a tongue-tie as well. Sometimes there is not.

The purpose of a careful assessment is therefore not to find a particular diagnosis to fit the symptoms, but to understand what is actually happening during feeding and which factors may be relevant to that individual baby and feeding dyad.

What if a tongue-tie is suspected?

If a tongue-tie is suspected, the next step should be a skilled assessment rather than assuming that the appearance of the frenulum explains the feeding difficulty.

The important question is whether the frenulum is restricting tongue function and motility in a way that is relevant to feeding.

A useful assessment therefore needs to consider more than whether a frenulum can be seen. It should explore the baby's history, feeding pattern, oral structures, tongue movement and function, and, where possible, observe feeding itself.  The NHS also recognises that not every baby with tongue-tie has feeding problems, and that feeding difficulties can occur in both breastfed and bottle-fed babies.

Where infant feeding is affected, it is particularly valuable for the assessment to include someone with substantial specialist infant-feeding knowledge. An International Board Certified Lactation Consultant (IBCLC) is the internationally recognised gold-standard credential in professional lactation care, with specific education, clinical experience and examination requirements.

This is particularly important because the current evidence does not support treating the presence of a frenulum in isolation. The 2024 UK Infant Feeding Survey found that, among mothers reporting a diagnosed tongue-tie, 23% reported no feeding problems, while others reported breastfeeding, bottle-feeding or both being affected.

A tongue-tie assessment should therefore answer a more useful question than simply “Does my baby have a tongue-tie?” It should help explore whether restricted tongue function is actually contributing to the feeding difficulty.

You can read more about this in What Does a Tongue-Tie Assessment Consider? and Tongue-Tie Restriction in Babies (UK).

If a tongue-tie is identified, treatment is not the only question

Finding a tongue-tie does not automatically mean that a frenulotomy is required. The next question is whether the restriction is clinically relevant to the feeding difficulties being experienced and what options are available.

For some babies and families, skilled feeding support and review may be sufficient. For others, persistent functional difficulties may lead to a discussion about frenulotomy. The decision needs to take account of the assessment findings, the baby's feeding, the potential benefits and limitations of treatment, the risks of the procedure and the family's own circumstances and priorities.

You can explore these decisions in more detail in Surgical Release or Conservative Management for My Baby's Tongue-Tie.

If a frenulotomy is being considered, families may also want to understand the procedure itself, the different methods used, the evidence and the possible risks. Those questions are explored separately in What a Frenotomy Procedure Means for Your Baby and Frenulotomy Methods in Infants: What Matters?.

Aftercare and feeding support also deserve their own consideration. A frenulotomy addresses a restrictive frenulum; it does not automatically resolve every contributor to feeding difficulty, particularly where a baby has already developed compensatory feeding patterns. Beyond the Tongue-Tie Release: Why Aftercare Matters explores why feeding support continues to matter after the procedure.

When should feeding difficulties be reviewed?

Persistent feeding difficulty deserves attention whether or not a tongue-tie is visible. It is particularly important to seek appropriate help if feeding is painful, exhausting, increasingly difficult, associated with concerns about intake or weight gain, or if a baby is regularly coughing, choking, becoming breathless, tiring excessively or appearing distressed during feeds.

Medical assessment is important when feeding changes occur alongside signs of illness, breathing difficulty, poor weight gain, unusual lethargy, colour change or other symptoms that suggest the baby may be unwell.

A tongue-tie assessment may be appropriate when restricted tongue movement is suspected, but it should not replace medical assessment where a baby's symptoms could have another cause.

Looking at the whole feeding picture

There is no single sign that can tell a family why feeding is difficult.

A baby may have a tongue-tie and feed well. A baby may have significant feeding difficulties without a tongue-tie. Another baby may have restricted tongue function alongside several other factors that are affecting feeding at the same time.

The most useful starting point is therefore the baby in front of you and the feeding that is actually happening. That means considering how the baby attaches or maintains a seal, how milk is flowing, how sucking, swallowing and breathing are coordinated, how comfortable feeding is, how the baby is growing and behaving, whether there are signs of illness or other medical concerns, and whether established feeding patterns or learned compensations may now be contributing.

Looking beyond tongue-tie is not about ruling tongue-tie out. It is about making sure that a visible frenulum does not become the explanation before the feeding difficulty itself has been properly understood.

Anatomy provides information. Function provides context.

References

Guóth-Gumberger, M. (2026) ‘Implications of the tongue's anatomy and biomechanics for breastfeeding’, Acta Paediatrica. doi: 10.1111/apa.70555.

Harrison, D., Reszel, J., Bueno, M., Sampson, M., Shah, V.S., Taddio, A., Larocque, L. and Turner, L. (2016) ‘Breastfeeding for procedural pain in infants beyond the neonatal period’, Cochrane Database of Systematic Reviews, 10, CD011248. doi: 10.1002/14651858.CD011248.pub2.

Office for Health Improvement and Disparities (2026) Infant Feeding Survey in England 2024: Full report. London: Department of Health and Social Care. Available at: https://www.gov.uk/government/statistics/infant-feeding-survey-in-england-2024/infant-feeding-survey-2024-full-report (Accessed: 22 September 2026).

O'Shea, J.E., Foster, J.P., O'Donnell, C.P.F., Breathnach, D., Jacobs, S.E., Todd, D.A. and Davis, P.G. (2017) ‘Frenotomy for tongue-tie in newborn infants’, Cochrane Database of Systematic Reviews, 3, CD011065. doi: 10.1002/14651858.CD011065.pub2.

Thomas, J. (2024) ‘Identification and management of ankyloglossia and its effect on breastfeeding in infants: Clinical report’, Pediatrics, 153(2), e2024067605. doi: 10.1542/peds.2024-067605.

NHS (2025) Congenital heart disease. Available at: https://www.nhs.uk/conditions/congenital-heart-disease/ (Accessed: 22 September 2026).