Reflux in babies: symptoms, causes and what helps
Watching your baby bring up milk after nearly every feed can feel worrying, especially in those first weeks when everything is new. The reassuring truth is that reflux is very common in young babies, and most grow out of it on their own well before their first birthday. This article covers what reflux is, why it happens, what to look out for, and the practical steps that can help, drawing on NHS guidance.
What is reflux?
Reflux happens when a baby brings up milk during or shortly after a feed. It is sometimes called posseting or spitting up, and it can range from a small dribble to a more obvious sick. In most cases it does not cause any lasting harm and is simply a sign that the digestive system is still maturing.
Reflux typically starts before a baby is 8 weeks old. Most babies who have it will no longer experience it by the time they reach 1 year of age, as the body naturally strengthens over time.
What causes reflux in babies?
The main reason babies are prone to reflux is that the ring of muscle at the bottom of the food pipe, which sits between the oesophagus and the stomach, is not yet fully developed. In adults this muscle keeps stomach contents where they belong, but in young babies it can be weak, allowing milk to travel back upward after a feed.
This is entirely normal for a newborn. As babies grow and that muscle matures, reflux tends to settle by itself without any specific treatment being needed.
Recognising the symptoms
Reflux shows up in different ways in different babies. Common signs to watch for include:
- Bringing up milk during or after feeds, sometimes quite frequently
- Coughing or hiccupping while feeding
- Restlessness during feeds, pulling away or seeming uncomfortable
- Gulping or swallowing after a burp
- Persistent crying that does not have an obvious cause
- Not gaining weight as expected, if a lot of milk is being lost
What is silent reflux?
Not all reflux is visible. Silent reflux is when a baby has the discomfort and other signs of reflux but does not actually vomit or bring up milk. Because there is nothing to see, it can be harder to identify. A baby with silent reflux may seem unsettled, feed poorly, or cry a lot without an obvious reason. If you suspect silent reflux, speaking to your health visitor or GP is a sensible next step.
What helps with reflux
There are several straightforward things you can try at home that may ease your baby's reflux:
- Hold your baby upright during feeds and for a period afterward. Keeping them more upright uses gravity to help milk stay down.
- Wind your baby regularly during and after feeds to release trapped air that can contribute to discomfort.
- Ask your health visitor about positioning during feeds. Small adjustments to how you hold your baby can sometimes make a noticeable difference.
One thing to be aware of: even though reflux can make babies unsettled, NHS guidance is clear that babies should always be placed flat on their backs to sleep. Raising the head of the cot or pram is not recommended, as it can increase the risk of the baby sliding into an unsafe position.
When medical treatment is needed
Many babies with reflux do not need medication, and the condition improves on its own. However, if home management is not helping, there are medical options a GP can discuss with you:
- For formula-fed babies, a GP may suggest adding a thickening powder to feeds or switching to a pre-thickened formula.
- If thickening does not help, or for breastfed babies where thickening is not practical, a doctor may consider medicines that reduce the amount of acid produced and help ease discomfort.
- In rare cases where reflux is severe and does not respond to other treatments, surgery to strengthen the muscle at the bottom of the oesophagus may be considered.
When to see a GP
Reflux that is mild and not causing distress often just needs time. Contact your GP if:
- Your baby's reflux continues even after trying the steps above
- Reflux starts for the first time after your baby is 6 months old
- You are worried your baby is not gaining enough weight
When to get urgent help
Some symptoms are a sign that something more serious may be going on. Call 999 or go to your nearest A&E if your baby:
- Has blood in their vomit
- Is vomiting with force (projectile vomiting)
- Has a swollen tummy
- Shows signs of dehydration, such as fewer wet nappies, a sunken fontanelle, or dry mouth
- Refuses to feed at all
Frequently asked questions
How common is reflux in babies?
Reflux is very common in young babies and is not usually a cause for concern. It most often begins before 8 weeks and resolves by the time a baby reaches 1 year old, as their digestive system matures.
What is silent reflux in babies?
Silent reflux is when a baby shows the signs and discomfort of reflux, such as crying, restlessness, or poor feeding, but does not visibly bring up milk. Because there is no obvious vomiting, it can be more difficult to spot. A health visitor or GP can help if you suspect this is happening.
What can I do at home to help a baby with reflux?
Holding your baby upright during and after feeds, burping them regularly, and discussing feeding positions with your health visitor are the main things you can try. Always keep your baby on their back for sleep, even if they have reflux.
When should I take my baby to the GP for reflux?
See your GP if reflux carries on despite trying home management strategies, if it starts after your baby is 6 months old, or if you have concerns about their weight. For blood in vomit, projectile vomiting, a swollen tummy, signs of dehydration, or refusal to feed, seek urgent medical help straight away.
Can reflux affect my baby's sleep?
Reflux can make babies unsettled and uncomfortable, which may disrupt feeding routines and sleep. Even so, NHS guidance is clear that babies should always be placed flat on their backs to sleep. Raising the head of the cot is not recommended and should be avoided.
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