Reflux in Babies: What’s Normal, What’s Not, and When to Worry
By Dr Daniel Gordon • 27, Dec 2025
Reflux in babies is one of the most common concerns I see in clinic, and one of the most stressful issues parents face in the early months.
If you’ve ever found yourself awake at 2am with an unsettled baby, watching milk come back up after feeds and wondering whether this is normal or something more serious, you’re certainly not alone.
I’m a GP with extensive experience caring for babies and children. I’m also a parent to three children, so I’ve been on both sides of the consultation. I’ve diagnosed reflux professionally, and I’ve lived through it at home. I know how confusing, exhausting, and overwhelming it can feel.
In this article, I’ll explain what reflux in babies actually is, the common symptoms to look out for, how it’s usually managed, and importantly, when you should be concerned.
What is reflux in babies?
Reflux in babies, medically known as gastro-oesophageal reflux disease (GORD), happens when milk or stomach contents travel back up from the stomach into the oesophagus, also known as the food pipe.
You might notice this as:
A small dribble of milk after feeds
A “posset”, which is a small spit-up
Less commonly, a larger vomit
Here’s the key point that reassures many parents: some reflux is completely normal in babies.
In the first few months of life, a baby’s lower oesophageal sphincter, the valve that keeps stomach contents down, is still developing. Babies also spend much of their time lying flat and have a purely liquid diet. When you put all of that together, it’s not surprising that milk sometimes comes back up.
In fact, most healthcare professionals would reasonably agree that almost every baby has some degree of reflux.
Common symptoms of reflux in babies
Reflux can present in several different ways, including:
Bringing up milk shortly after feeding
Coughing or hiccupping during or after feeds
Being unsettled during or after feeds
Frequent crying or back arching
This is where reflux becomes particularly tricky. These symptoms overlap heavily with normal baby behaviour, colic, and general infant fussiness. That overlap is exactly what causes so much anxiety for parents.
Many parents feel torn between worrying that something is wrong and not wanting to waste their doctor’s time if it’s just normal behaviour. Well-meaning friends and family often share their own experiences, which can add to the confusion rather than ease it.
What is silent reflux?
Some babies have what’s known as silent reflux. Unlike typical reflux, there may be little or no visible vomiting. The stomach contents come back up but are swallowed again.
Babies with silent reflux may:
Grimace or look uncomfortable
Arch their back during feeds
Have frequent hiccups or coughing
Struggle with sleep
Because there’s no obvious spit-up, silent reflux can be harder to recognise and often leaves parents questioning what’s really going on.
Will reflux get better on its own?
For most babies, the answer is yes.
Reflux commonly improves after around six months of age. By this stage, babies spend more time upright, begin weaning onto solid foods, and the lower oesophageal sphincter becomes stronger as it matures.
Every baby is different, but for the majority, reflux settles with time.
When should you seek medical advice?
This article provides general guidance, not personalised medical advice. If you’re worried or unsure about your baby, it’s always best to speak with a healthcare professional.
There are a number of red flag symptoms that suggest your baby requires urgent medical assessment. These include:
Green or yellow vomit
Vomit containing blood or material that looks like coffee grounds
Projectile vomiting, particularly in young babies
Blood in the nappy
A swollen or tender abdomen
Persistent refusal to feed
High-pitched, inconsolable crying
Poor weight gain or weight loss
This list isn’t exhaustive. If something doesn’t feel right, trust your instincts and get your baby checked.
How is reflux in babies treated?
The first line of treatment is usually non-medical.
This often includes:
Slowing down feeds
Winding your baby more frequently
Keeping your baby upright for longer after feeds
If symptoms persist despite these measures, or if a baby is distressed or not gaining weight, medical treatment may be considered.
Options can include:
Thickening feeds
Medications that reduce stomach acid, such as omeprazole
It’s important to understand that these medications do not stop reflux itself. Instead, they reduce the acidity of stomach contents, which can lessen irritation and discomfort in the oesophagus.
Reflux and cow’s milk protein allergy
There can be an overlap between reflux and cow’s milk protein allergy. Not every baby with reflux has a milk allergy, but in some cases reflux is one feature of an underlying allergy.
This is more likely if there are additional signs such as eczema, other allergic symptoms, or a strong family history of allergy.
If a milk allergy is suspected, a milk-free trial may be recommended. This should always be done under medical supervision to avoid unnecessary dietary restriction or nutritional problems.
Reflux in Babies: Key Takeaways for Parents
Reflux in babies is common and usually harmless. It’s largely due to an immature digestive system combined with normal infant feeding patterns. For most babies, it improves with time.
Because reflux symptoms overlap so closely with normal baby behaviour, it can be difficult to know when to worry. When there’s uncertainty, seeking professional advice is always the right decision. Any red flag symptoms should be assessed urgently.
Many parents going through reflux feel unsure or overwhelmed at times, and that’s completely understandable. Support and reassurance can make a real difference, so reaching out to a trusted healthcare professional to talk things through is always worthwhile.
If you found this article helpful, you may want to watch my video on cow’s milk protein allergy in babies, which explores the crossover symptoms and how to tell the difference.
Reflux in Babies: Frequently Asked Questions
Is reflux normal in babies?
Yes. Reflux is very common in babies and is usually normal. It happens because their digestive system is still developing.
When does reflux improve in babies?
Reflux often improves after around six months, as babies sit upright more and start solid foods.
What is silent reflux?
Silent reflux is when stomach contents come back up but are swallowed again, so there is little or no visible spit-up.
How can I tell if reflux is a problem?
Reflux may be a concern if a baby is distressed, refusing feeds, or not gaining weight.
When should I worry about reflux?
Any parental concern should prompt urgent medical review. Examples of some symptoms which may suggest serious problems include green or bloody vomit, projectile vomiting, blood in the nappy, poor feeding, or poor weight gain.
How is reflux treated?
Most babies need simple feeding changes and supportive measures only. Medication is usually only considered in more severe cases.
Do reflux medicines stop reflux?
No. They can help improve symptoms by reducing acidity and discomfort but generally do not stop milk coming back up.
Is reflux linked to cow’s milk protein allergy?
Sometimes. Reflux can be one symptom, especially if eczema or other allergy signs are present.
Disclaimer
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