Information for parents
Reflux in Babies: When Is It Normal and When Should I Worry?
Bringing up milk after feeds — spilling or possetting — is extremely common in healthy young babies. It happens because the valve at the top of the stomach is still immature, and it usually improves as your baby grows, often settling by around 12 months.
A baby who spills frequently but is feeding well, growing well and generally content is described as a ‘happy spitter’. Frequent vomiting on its own does not necessarily mean a baby needs acid-suppressing medicine.
Why babies reflux
In babies, the muscular ring between the food pipe (oesophagus) and the stomach relaxes frequently and is still maturing. Babies also have small stomachs, an all-liquid diet, and spend a lot of time lying down. Put together, it is easy for milk to come back up.
What’s normal?
Normal infant reflux (gastro-oesophageal reflux, or GOR) often peaks around three to four months of age. Babies may bring up small or sometimes large-looking amounts of milk several times a day. As long as they are feeding, gaining weight and are generally content, this is considered normal.
What is GORD?
Gastro-oesophageal reflux disease (GORD) is when reflux causes troublesome symptoms or complications — for example poor weight gain, persistent feeding refusal, inflammation of the oesophagus, or breathing problems. GORD is diagnosed by a doctor after considering the whole picture, and it is far less common than normal reflux.
Does “silent reflux” exist?
Reflux does not always come all the way out of the mouth, so ‘silent’ reflux does occur. However, the label is often applied to babies who are simply unsettled, which can lead to unnecessary medication. Crying, back arching and short sleeps are common in all young babies and have many causes. A doctor can help work out whether reflux is really the driver.
Reflux versus colic
Colic describes long periods of crying in an otherwise healthy, thriving baby, typically peaking at around six weeks and improving by three to four months. It is not caused by reflux, and reflux medicines have not been shown to help colic.
Reflux versus cow’s milk protein allergy
In some babies, cow’s milk protein allergy can cause vomiting and reflux-like symptoms, usually alongside other features such as eczema, blood or mucus in the poo, diarrhoea or poor growth. Reflux alone is rarely due to milk allergy. If allergy is suspected, a doctor may recommend a supervised trial of removing cow’s milk protein.
Feeding refusal and arching
Some babies pull away, cry or arch during feeds. This can be related to reflux, but also to feeding technique, flow rate, tiredness, overfeeding or distraction. Persistent feeding refusal that affects intake or growth deserves a medical review.
Poor weight gain
Growth is one of the most important things doctors look at. A baby who is gaining weight well is very unlikely to have significant reflux disease. Faltering growth, on the other hand, always needs assessment, because it may point to feeding difficulties, allergy or other conditions.
What parents can safely try
- Avoid overfeeding — smaller, more frequent feeds can help some babies
- Hold your baby upright for a while after feeds
- Burp during and after feeds
- For formula-fed babies, your doctor may suggest a thickened formula
- Avoid exposure to cigarette smoke
- Always follow safe sleeping advice — place your baby on their back to sleep. Raising the cot or sleeping your baby on their side or tummy is not recommended for reflux
When medication may be considered
Acid-suppressing medicines (such as proton pump inhibitors like omeprazole) reduce stomach acid but do not stop reflux itself. International guidelines advise against using them for crying or spilling alone. They may be considered for babies with confirmed or strongly suspected GORD — for example with oesophageal inflammation or significant feeding problems — usually as a time-limited trial with review. They can have side effects, so they are best started and stopped under medical guidance.
When investigations are actually useful
Most babies with reflux need no tests at all. The diagnosis is based on history, feeding and growth, and examination. Tests are considered when symptoms are atypical, severe, not responding to treatment, or when red flags are present.
When gastroscopy or pH/impedance testing might be considered
A gastroscopy looks at the lining of the oesophagus and stomach and can take small biopsies, for example to look for inflammation or eosinophilic oesophagitis. A pH/impedance study measures reflux episodes over 24 hours using a thin tube through the nose. These tests are reserved for selected infants and children where the result will change management.
When should I be concerned?
See a doctor promptly if your baby has reflux or vomiting along with any of the following:
- Green (bile-stained) vomit
- Forceful, projectile vomiting, particularly in babies aged about 2–8 weeks
- Blood in the vomit or poo
- Poor weight gain, weight loss or refusal to feed
- Vomiting that starts after six months of age or persists beyond 12 months
- Fever, lethargy, a swollen tummy or signs of dehydration (fewer wet nappies)
- Breathing problems, pauses in breathing or choking episodes
Green vomit, a baby who is very drowsy or floppy, or signs of dehydration need urgent medical attention.
When should my child see a paediatric gastroenterologist?
If reflux comes with feeding or swallowing difficulties, read about eosinophilic oesophagitis and cow’s milk allergy.
Most infant reflux is managed well by your GP, child health nurse or paediatrician. Referral to a paediatric gastroenterologist may help when there is poor growth, persistent feeding difficulty, suspected GORD that is not improving, blood in vomit or stools, or when investigations such as gastroscopy are being considered.
Straight answers
Questions parents often ask
My baby vomits after every feed — is that normal?
It can be, particularly in the first few months. If your baby is feeding well, gaining weight and generally content, frequent spilling is usually normal reflux. If growth is poor or there are red flags, see your doctor.
Why does my baby arch during feeds?
Arching can be linked to reflux, but also to flow rate, wind, tiredness, overfeeding or simply being distracted. It is common and on its own does not confirm reflux disease.
Does my baby have silent reflux?
Silent reflux does exist, but crying and unsettled behaviour are common in all babies and have many causes. A doctor can help decide whether reflux is likely to be the cause before medication is considered.
Could reflux actually be a milk allergy?
Sometimes, but usually when there are other clues such as eczema, blood or mucus in the poo, diarrhoea or poor growth. Reflux alone is rarely due to allergy.
Does my baby need omeprazole?
Most babies do not. Acid-suppressing medicines do not stop reflux and are not recommended for crying or spilling alone. They may help selected babies with confirmed or strongly suspected reflux disease, under medical guidance.
Will reflux affect my baby’s growth?
Normal reflux does not affect growth. If your baby is not gaining weight as expected, that needs a medical review to look for the cause.
When does infant reflux usually improve?
Most babies improve steadily from around six months, as they sit up and start solids, and the majority have settled by 12 to 18 months.
Related children’s gut-health resources
Cow’s Milk Protein Allergy in Babies
Clearing up the confusion: symptoms, diagnosis, formulas and growing out of it.
Eosinophilic Oesophagitis in Children
Food sticking, feeding difficulties and reflux-like symptoms — how EoE is diagnosed and managed.
Gastroscopy and Colonoscopy in Children
What to expect before, during and after your child’s procedure.
If your child has persistent gastrointestinal symptoms or your GP has recommended specialist assessment, you can find information about appointments with Dr Rohan Malik here.