Reflux in Babies (GOR and GORD)
Why most 'reflux' in babies is normal, the difference between GOR and GORD, and what actually helps.
- Last reviewed
- Sources cited
- 4 sources
- Author
- Dr Jubal John, FRACP
- Category
- medical guides
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Take-home
Most spilling in babies is normal. Around 40% of healthy infants have daily regurgitation, and it resolves before age 1 in roughly 90% of those affected, this is GOR (gastro-oesophageal reflux), a mechanical quirk of being small. It does not need medicine. A much smaller number have GORD (reflux disease), where reflux actually harms the baby, poor weight gain, feeding refusal, apnoeas, or back-arching in pain. The Australian and international NASPGHAN-ESPGHAN 2018 consensus is the same: don’t start reflux medicines unless there’s objective evidence of disease.
GOR vs GORD: at a glance
"Silent reflux"
The term silent reflux is commonly used online to explain any unsettled baby. The NASPGHAN-ESPGHAN 2018 guideline is clear: there is no reliable way to diagnose reflux in a baby who only cries. Crying, colic, and the evening witching-hour are usually caused by the normal crying peak, not by reflux. Starting reflux medicines “just to try” is not recommended.
Why do babies reflux?
Three anatomical reasons, all of which resolve with time:
- The lower oesophageal sphincter (the valve at the top of the stomach) is immature
- Babies spend most of the day lying flat, so gravity doesn’t help
- Their stomach is small relative to the volume of milk they take in
By 6 months, as solids start and more upright time happens, most babies with daily spilling settle. By 12 months, around 90% have outgrown infantile regurgitation (NASPGHAN-ESPGHAN 2018).
What actually helps
Most reflux gets better with smaller, more frequent feeds and 20-30 minutes of upright cuddle time afterwards. The cot stays flat for every sleep.
Positioning and feeding technique
First-line measures
- Smaller, more frequent feeds: fill the stomach less per feed
- Upright hold for 20–30 minutes after a feed
- Paced bottle-feeding: prevents overfilling
- Effective burping: once mid-feed, once at the end
- Review overfeeding: many formula-fed babies are being offered volumes over 180 mL/kg/day
- Side-to-side, cot-flat sleep: the cot stays flat, always. Inclined sleepers are not safe (see Safe Sleep).
Thickened feeds
For formula-fed babies where positioning hasn’t helped and GORD is suspected, thickened feeds can reduce the volume of visible spills. (These are pre-thickened formulas, or rice-cereal thickeners for older babies.) They don’t fix the underlying reflux, but they cut the laundry and the worry, an intermediate step before medication.
Cow’s-milk-protein allergy: worth considering
In a small group of babies, “reflux” is actually cow’s-milk-protein allergy (CMPA). Suspect it when:
- Reflux + eczema
- Blood or mucus in stools
- Severe colic + vomiting
- Family history of atopy
The ASCIA / iMAP / RCH approach is the same: a 2–4 week elimination trial (hydrolysed/eHF or amino-acid formula if formula-fed; maternal dairy exclusion if breastfeeding) followed by a planned reintroduction. If reflux improves and returns on challenge, the answer is clear. If it doesn’t change, dairy is not the cause.
See our dedicated cow’s milk protein allergy guide for the full diagnostic pathway, formula choices, breastfeeding management, and the milk-ladder approach to reintroduction.
Medications: when appropriate
Reflux medicines are not first-line
Proton-pump inhibitors (PPIs) such as omeprazole are useful when there is objective evidence of oesophagitis or GORD, not for the crying-baby phenotype. Large paediatric trials show no benefit over placebo for PPIs in the “crying, arching, posseting” baby without weight or feeding concerns. And the side effects are real, altered gut flora, rare fractures with long use, a small infection risk.
H2-blockers (ranitidine) are no longer first-line since international withdrawal in 2020.
We prescribe PPIs when the clinical picture justifies it, not as a reassurance measure.
When to seek help
Green — usually fine
Green: normal
- Baby spits up with feeds but is alert, feeding, and growing
- Weight gain on track (weigh on the same scale monthly)
- The spills improve between 4 and 9 months
Amber — be alert
Amber: book a review
- Weight gain has slowed or stalled
- Feeds increasingly difficult, baby pulls off or arches during feeds
- Persistent dry cough or wheeze after feeds
- Eczema, mucus in stools, or strong atopic family history
Red — act now
Red: seek same-day / emergency review
- Blood in vomit (not streaks from maternal cracked nipples, frank blood)
- Green/bile-stained vomit in a newborn (possible bowel obstruction, 000 / Emergency)
- Forceful, projectile vomiting in a 2–8 week old (possible pyloric stenosis, same-day review)
- Apnoeas: pauses in breathing of 20 seconds or more, or any pause with floppiness or colour change, during or after reflux
- Signs of dehydration (dry mouth, sunken fontanelle, no wet nappies for 6–8 hours, lethargy)
Common questions
“Should my baby sleep on an incline for reflux?”
No. Inclined sleep and wedges increase SIDS risk and are not recommended (Red Nose, Australian Resuscitation Council, AAP). The cot is flat for every sleep, reflux or not.
“Is frequent spilling the reason my baby cries in the evenings?”
Usually not. Most unsettled-baby crying in the first 12 weeks is the normal crying peak (see Unsettled Baby). Babies with true GORD are unsettled during feeds and not just in the evening.
“Will my baby grow out of it?”
Yes, around 90% of babies are symptom-free by their first birthday (NASPGHAN-ESPGHAN 2018). The job in the meantime is to keep feeds going, weight gaining, and parents sane.
“Do I need special formula?”
Only if cow’s-milk allergy is suspected. Anti-reflux (“AR”) formulas are pre-thickened and can help with visible spilling, they’re available without prescription but a review is worthwhile before switching.
Related reading
- Cow’s milk protein allergy, when reflux is actually allergic
- Eczema management, often coexists with CMPA-driven reflux
- Breastfeeding support — getting the latch right
- Safe sleep
- Unsettled baby — the crying peak
- When to seek help
Worried your baby's reflux is more than normal spilling?
Start with your GP, who can refer for a structured review: weight trajectory, feed observation, and positioning help decide whether this is normal reflux or GORD. Medicines are rarely the first answer.