Can Tongue Tie Cause Reflux in Babies?

Many families notice that feeds involve clicking, gulping, coughing, frequent winding, milk coming back up and an unsettled baby. It is understandable to ask, can tongue-tie cause reflux? The careful answer is that a tongue-tie may contribute to feeding mechanics that are associated with reflux-like symptoms in some babies, but it is not established as a direct cause of gastro-oesophageal reflux disease (GORD).

Reflux symptoms are common in infancy, and feeding challenges are often multifactorial. A helpful assessment considers the whole picture: the baby’s growth and health, their oral function, how feeding is going, milk flow, positioning, the family’s concerns and any symptoms that need medical review. Anatomy provides information. Function provides context.

What do we mean by reflux?

Gastro-oesophageal reflux is the movement of stomach contents back into the oesophagus. In young babies, small amounts of milk coming back up are very common. Their digestive system is still maturing, they mostly have a liquid diet and they spend much of their time lying down. A baby can posset frequently and still be well, comfortable and growing appropriately.

GORD is different. It describes reflux associated with troublesome symptoms or complications, such as feeding refusal, poor weight gain, marked distress or inflammation of the oesophagus. Symptoms often attributed to reflux - crying, waking frequently, hiccups, arching or bringing up milk - are not specific to reflux and can have several possible explanations (NICE, 2015; Rosen et al., 2018).

This distinction matters. Treating ordinary developmental reflux as disease can create understandable anxiety and may lead families away from practical feeding support that could make a real difference.

Can tongue-tie cause reflux symptoms?

A restrictive lingual frenulum, commonly called tongue-tie, is a variation in which the tissue beneath the tongue may limit tongue movement. Its appearance alone cannot tell us whether it is affecting feeding. Some babies with a visible frenulum feed comfortably and effectively; others have feeding difficulties where restricted tongue function may be one relevant factor.

The proposed connection with reflux is indirect. If a baby cannot maintain an effective seal or coordinate sucking, swallowing and breathing comfortably, they may take in more air during feeds. They may also come off and re-latch repeatedly, cough with faster flow, or become tired and unsettled. Swallowed air can increase burping and abdominal discomfort, and milk may be brought up alongside it. These experiences can look like reflux.

However, this is a plausible clinical mechanism, not proof that tongue-tie causes GORD. Current evidence does not demonstrate that tongue-tie is a sole or universal cause of reflux, nor that frenulotomy reliably resolves reflux symptoms. The Academy of Breastfeeding Medicine advises that decisions about ankyloglossia should follow a skilled breastfeeding assessment rather than be based on anatomy appearance alone (Academy of Breastfeeding Medicine, 2021).

For bottle-fed babies, similar principles apply. A baby may have difficulty maintaining a seal, cope poorly with teat flow, take frequent pauses or seem to swallow air. Yet bottle-feeding challenges can also relate to teat flow, pacing, feeding position, volume, the baby’s maturity, nasal congestion or an underlying health issue. It would be too simple to attribute these difficulties to a frenulum without considering alternatives.

Tongue-tie, Reflux or Feeding Mechanics?

Not every baby who brings milk back up has gastro-oesophageal reflux disease (GORD). In some infants, particularly those with tongue-tie and associated feeding dysfunction, what appears to be “reflux” may actually be the consequence of how the infant is feeding.

A restricted tongue can affect the infant’s ability to achieve and maintain an effective seal, coordinate suck–swallow–breathe patterns and regulate the flow of milk. This can create a cascade of feeding behaviours that may produce symptoms which look very similar to reflux.

Rapid feeding and overfeeding

This can be particularly noticeable in bottle-fed infants. When milk is flowing quickly and the infant has limited ability to regulate that flow, a feed may be completed very rapidly. The infant may continue to suck and accept milk even though their stomach is approaching or has reached its comfortable capacity.

There is an important distinction here between wanting to suck and actually needing more milk. Feeding is not simply controlled by hunger in the moment. Satiety is a physiological process involving signals from the stomach and intestine, together with neural and hormonal signalling. When milk is delivered very quickly, there can be a mismatch between the amount of milk consumed and the time required for these fullness signals to influence the infant's behaviour.

The result can be overfeeding relative to the infant's immediate gastric capacity. Once the stomach is too full, milk may be brought back up. To the caregiver, this can look like reflux, but the mechanism is different from pathological GORD.

This is one reason why looking at the whole feeding pattern, rather than simply the volume taken or the fact that an infant is vomiting, is so important.

Swallowing air (aerophagia)

A second potential mechanism is aerophagia — swallowing excessive air during feeding.

Efficient feeding requires highly coordinated movements of the tongue, jaw, lips, pharynx and respiratory system. If an infant is struggling to maintain an effective seal or coordinate milk transfer with breathing, they may compensate by repeatedly breaking and re-establishing the seal, gulping, spluttering, clicking or swallowing air alongside the milk.

This can occur with both breast and bottle feeding, although the mechanics and flow characteristics are different.

Air entering the stomach can contribute to gastric distension. A distended stomach is less comfortable and can increase the likelihood that milk and gastric contents are brought back up, particularly when the infant is moved, compressed or laid down soon after a feed.

Again, this does not necessarily mean that the infant has GORD. Milk coming back up can be the end result of feeding mechanics, excessive gastric volume and swallowed air rather than evidence of an underlying gastrointestinal disease.

Why this distinction matters

Gastro-oesophageal reflux (GER) is the movement of stomach contents back into the oesophagus and is common in infancy. GORD is different: it refers to reflux that causes troublesome symptoms or complications and requires clinical assessment.

Tongue-tie should therefore not be presented as a proven cause of GORD. Current evidence investigating the relationship between ankyloglossia and reflux is limited, and studies reporting improvement in reflux symptoms following frenotomy have not been able to establish that the tongue-tie was the cause of those symptoms.

However, a tongue-tied infant can experience feeding difficulties that may contribute to reflux-like symptoms. Looking at milk flow, feeding duration, swallowing frequency, airway protection, oral seal, air intake, feeding volume and the infant's regulation during the feed can help identify whether the problem may be occurring primarily at the feeding interface rather than within the gastrointestinal tract.

This is why an assessment of an infant presenting with “reflux” should not automatically stop at the digestive system. Sometimes the more useful question is not simply “Why is this baby refluxing?” but “What is happening during the feed that is causing this baby to bring milk back up?”

Why feeding assessment is more useful than symptom lists

Lists of possible tongue-tie symptoms can be helpful prompts, but they are not diagnostic. Clicking, reflux-like behaviour and fussiness occur in babies with and without tongue-tie. Equally, a baby may have restricted tongue movement but no functional feeding difficulty.

A skilled clinician will usually explore whether there is a pattern across the feeding relationship. This might include comfort for the feeding parent, latch or seal stability, audible swallowing, milk transfer where relevant, the baby’s ability to stay settled at the feed, weight trajectory, output and the timing of symptoms. Observing a feed, where possible, adds information that cannot be gathered from a photograph of the mouth or a symptom checklist.

For breastfeeding families, discomfort, nipple compression after feeds, frequent feeding or concerns about milk transfer may warrant support, but each has a range of potential causes. Positioning, attachment, breast fullness, milk ejection reflex, previous breast surgery, infant prematurity and health conditions can all be relevant. For families expressing milk, a flange fitting assessment may also be useful where pumping is painful or inefficient.

This doesn’t mean your concerns about your baby should be dismissed. If your baby is unsettled, bringing milk back up, swallowing lots of air or struggling during feeds, those symptoms are real and deserve to be understood. Sometimes the answer may not be “reflux” alone — looking at how your baby is feeding can help build a clearer picture of what is happening.

What does the evidence say about frenulotomy and reflux?

Research on frenulotomy has mainly examined short-term breastfeeding outcomes, particularly maternal nipple pain and breastfeeding effectiveness. The Cochrane review found that frenotomy was associated with reduced maternal nipple pain in the short term, while evidence for longer-term breastfeeding outcomes remained limited (O’Shea et al., 2017).

Reflux has not been studied with the same quality or consistency. Some observational reports describe improvement in parent-reported reflux symptoms after a tongue-tie release, but these findings cannot establish cause and effect. Infant reflux commonly changes over time, feeding support may be provided alongside the procedure, and parent-reported symptoms are influenced by many factors. Controlled research using clear definitions of reflux and meaningful follow-up is still needed.

Where a restrictive lingual frenulum is judged to be affecting feeding function, frenulotomy may be one option discussed as part of shared decision-making. It is not a treatment for reflux in isolation. Conservative feeding support may be appropriate, either before considering a procedure or as the preferred pathway for a family. The best plan depends on the individual baby, the feeding goals of the family and the clinical findings.

Practical things you can try

If your baby is showing reflux-like symptoms, there are some simple changes you can try during and after feeds. These won't address every cause of reflux, but they may help you work out whether feeding mechanics are contributing to your baby's symptoms.

• Avoid excessive overfeeding. A baby who feeds very quickly may take more milk than their stomach can comfortably manage before their fullness signals have had time to catch up. Try responding to your baby's cues rather than encouraging them to finish a feed simply because milk remains. Smaller, appropriately paced feeds may be more comfortable for some babies.

• Slow the feed down. If your baby is taking a bottle very quickly, consider whether the teat flow is too fast. A slower flow and a more paced approach can give your baby more time to coordinate sucking, swallowing and breathing and recognise when they have had enough.

• Give your baby regular pauses. Short pauses during a feed can give your baby an opportunity to breathe, swallow, release air and respond to their own fullness cues.

• Try winding before as well as during or after a feed. Some babies, particularly those who swallow a lot of air, may already have air in their stomach before they begin feeding. This can be particularly relevant where a baby has a high palate and is struggling to maintain an effective seal, as they may swallow air while trying to organise their mouth around the breast or teat. A gentle opportunity to release air before starting a feed may sometimes help.

• Don't wait until the end of the feed to wind. If your baby is gulping, clicking, pulling away or becoming unsettled, pause and give them an opportunity to release swallowed air before continuing.

• Watch your baby's cues rather than encouraging them to finish. Turning away, slowing their sucking, relaxing their hands or becoming sleepy can all be signs that they need a break or have had enough. A baby doesn't necessarily need to finish the bottle simply because milk remains.

• Keep your baby upright after feeding. If this seems to help your baby, you can hold them comfortably upright for around 20–30 minutes after a feed. Some babies may need longer, while others are comfortable sooner. Avoid pressure on their tummy during this time. Keeping a baby upright after feeding is not a treatment for GORD, but may help reduce milk coming back up for some babies.

• When your baby is ready to sleep, always place them flat on their back on a firm, flat sleep surface. Do not use inclined sleep products or leave your baby sleeping propped upright.

• Look at how your baby is feeding, not just how much they are taking. Are they gulping, clicking, frequently losing their seal, swallowing noisily, pulling away or becoming unsettled? These observations can provide useful clues about what is happening during the feed.

• If breastfeeding, consider the milk flow as well as your baby's tongue function. A very fast let-down can sometimes make it difficult for a baby to coordinate sucking, swallowing and breathing. Positioning and feeding strategies may help some babies manage the flow more comfortably.

• Keep a short feeding and symptom diary. Note the duration of feeds, approximate volume if bottle feeding, how quickly the feed was taken, signs of air swallowing and what happened afterwards. Patterns can be much easier to see when they are written down.

The aim isn't to try every suggestion at once. Make one change at a time where possible and see whether it makes a difference. If your baby's symptoms improve when feeding is slowed down, excessive feeding is reduced or swallowed air is better managed, that can be useful information when considering whether feeding mechanics are contributing to what looks like reflux.

When reflux-like symptoms needs urgent medical assessment

Most posseting is harmless, but some symptoms need prompt review by a GP, paediatric clinician or urgent care service. Seek medical advice if a baby has green or yellow vomit, blood in vomit or stools, forceful or projectile vomiting, fever, persistent diarrhoea, a swollen abdomen, breathing difficulty, dehydration, unusual sleepiness, feeding refusal, faltering growth/weight loss or fewer wet nappies than expected.

A baby who appears very distressed, has recurrent choking episodes or whose feeding changes suddenly also deserves timely assessment. These signs are not evidence of tongue-tie and should not be managed by assuming a feeding restriction is the explanation.

Next steps for families and professionals

If reflux-like symptoms occur alongside feeding difficulty, start with a thorough history and an observed feed where possible. For families, it can help to note what happens during feeds, how often milk comes back up, whether the baby appears comfortable, nappy output and any changes in weight or alertness. This is not about monitoring every feed perfectly; it gives the clinician a clearer starting point.

For professionals, assessment should remain function-focused and include differential diagnosis. Consider the infant’s age, medical history, growth, feeding method, flow management and the wellbeing of the parent as well as oral anatomy. Avoid presenting frenulotomy as a test of whether symptoms are ‘really’ caused by tongue-tie. Families deserve clear information about uncertainty, potential benefits, limitations and available support whatever they decide.

A feeding journey can be exhausting when every feed feels unpredictable. Whether the issue is developmental reflux, feeding mechanics, tongue function or a combination of factors, being heard and receiving careful, individualised support is a meaningful place to begin.

References

Academy of Breastfeeding Medicine (2021) ‘Academy of Breastfeeding Medicine Position Statement on Ankyloglossia in Breastfeeding Dyads’, Breastfeeding Medicine, 16(4), pp. 278-281.

National Institute for Health and Care Excellence (NICE) (2015) Gastro-oesophageal reflux disease in children and young people: diagnosis and management. NICE guideline NG1. London: NICE.

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.

Rosen, R., Vandenplas, Y., Singendonk, M., Cabana, M., DiLorenzo, C., Gottrand, F., Gupta, S., Langendam, M., Staiano, A., Thapar, N., Tipnis, N., Tabbers, M. and Benninga, M. (2018) ‘Pediatric gastroesophageal reflux clinical practice guidelines: joint recommendations of the North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition and the European Society for Pediatric Gastroenterology, Hepatology, and Nutrition’, Journal of Pediatric Gastroenterology and Nutrition, 66(3), pp. 516-554.