Baby Reflux: Signs, Soothing & When to See a GP

What reflux looks like, what actually helps, and the few red flags that need a GP visit.

Up to half of Australian babies will posset, spit up or arch through a feed at some point. Most of the time it's physiological reflux — uncomfortable but harmless. Here's how to tell the difference between normal reflux, silent reflux, and the small group of babies who need medical review.

What is reflux?

Reflux is the backflow of milk from the stomach into the oesophagus. A newborn's lower oesophageal sphincter is still maturing, which is why it's so common in the first 6 months. By 12 months, around 95% of babies have grown out of it.

Typical signs

Bringing up small amounts of milk after feeds (posseting).
Mild fussiness or arching during or after feeds.
Hiccups, occasional gagging.
Weight gain stays on track.

Baby Reflux: Signs, Soothing & When to See a GP — supporting image — Reflux usually peaks around 4 months and settles by the first birthday.

Silent reflux signs

Silent reflux happens when milk comes up but is re-swallowed. Watch for:

Frequent throat-clearing, gulping, or wet hiccups.
Discomfort 20–60 minutes after feeds.
Better with upright holding, worse lying flat.

What actually helps

Smaller, more frequent feeds. Overfeeding is the most common trigger.
Pause to burp halfway through and at the end.
Hold upright for 20–30 minutes after every feed.
Avoid tight nappies and waistbands after feeds.
Tummy time — but only 30+ minutes after eating.

Track patterns in our free Baby Tracker — feed time, volume, and unsettled periods often reveal a clear trigger.

When to see your GP

Book a visit (or call 13HEALTH) if you notice:

Poor weight gain or weight loss.
Forceful or projectile vomiting.
Green or bloody vomit.
Refusing feeds repeatedly.
Breathing difficulties, persistent cough, or blue spells.

Medication is only used when reflux is causing complications — most Australian GPs and paediatricians follow a conservative approach.

Keep reading

Frequently asked questions

Is spit-up after every feed normal?

Small amounts (a tablespoon or so) after feeds is normal in babies under 6 months as long as weight is tracking well.

Does formula make reflux worse?

Not usually. Overfeeding does. Stick to age-appropriate feed sizes.

Should I prop the cot up?

No. Australian safe-sleep guidance is a flat, firm mattress. Use upright holding after feeds instead.

When does reflux peak?

Around 4 months. Most babies improve once they sit upright more and start solids.

Could it be a milk allergy?

Possibly. Persistent reflux plus rashes, blood in stools, or poor weight gain warrants a GP review.

This article is general information and not medical advice. For personalised support, speak to your GP or call Pregnancy, Birth and Baby on 1800 882 436.

Reflux through the first year — what to expect

0–6 weeks

Reflux often starts in the first 2–3 weeks. Cluster feeds, immature sphincter, and a lying-down lifestyle all combine. Most babies posset after feeds but stay settled and gain weight.

6 weeks – 4 months

Symptoms typically peak around 4 months. Baby is feeding bigger volumes, has more awake time, and may be teething. Hold upright longer, slow feeds down, and resist the urge to switch formulas every fortnight.

4–6 months

As baby spends more time upright and starts solids, most reflux fades. The introduction of textures helps gut motility.

6–12 months

By the first birthday, around 95% of babies have outgrown reflux entirely. The remaining 5% are usually under paediatric review with a clear management plan.

Position tricks Australian MCH nurses recommend

Side-lying breastfeed: reduces aerophagia (air swallowing) compared with cradle hold.
Paced bottle feeding: hold bottle horizontal, let baby control flow, pause every 30–60 seconds.
Upright carry post-feed: sling, soft carrier or simply over-the-shoulder. Aim for 20–30 minutes.
Nappy change BEFORE feeds, not after: avoids the tip-and-press that triggers spit-up.

What Australian paediatricians look for at a reflux review

If reflux is bad enough for a GP referral, here's what the paediatrician will assess:

Growth trajectory on your blue book percentile chart.
Volume and frequency of feeds.
Vomiting pattern (effortless vs forceful, content, colour).
Sleep, settling and pain signs.
Stools — any blood, mucus, or unusual frequency.
Skin — eczema or rashes pointing to milk protein issues.

Medication (such as omeprazole) is reserved for babies with poor weight gain, oesophagitis, or significant feed refusal. Most reflux is managed conservatively.

Looking after yourself

Reflux is exhausting. The constant laundry, the soaked shoulders, the wakeful nights — it wears parents down faster than almost any other newborn issue. Be honest with your MCH nurse about how you're coping. Free supports include PANDA (1300 726 306), Tresillian, and Karitane sleep and settling services. You don't need to be at crisis point to call.

A typical reflux baby's day — a parent's perspective

Here's what a calm, reflux-friendly day looks like, drawn from notes our Maternal Health Nurses have shared with hundreds of Australian families.

6.00am: small feed, hold upright 25 minutes, then short awake time in a baby carrier.
7.30am: nap (use a bedside crib at a flat angle as per Red Nose guidance).
9.30am: feed, upright cuddle, gentle tummy time 30 minutes later.
11.00am: outside walk in pram or sling — upright movement helps gut motility.
Early afternoon: shorter, more frequent feeds rather than one big one.
Late afternoon (witching hour): bath, baby massage, calmer light, smaller feed.
Evening: dim lights, white noise, last big feed with extra burping.

Reflux quick-reference card

Hold upright: 20–30 minutes after every feed.
Pause to burp: mid-feed and at the end.
Feed sizes: smaller and more frequent beats large and spaced.
Track patterns: use the free Baby Tracker.
Sleep position: flat on back, always — never propped, never on tummy unsupervised.
Call GP if: projectile vomiting, weight loss, blood, fewer wet nappies, breathing issues.

Putting it all together

Reflux feels never-ending in the thick of it. The good news is that almost every baby grows out of it well before their first birthday, and most of the suffering can be eased with positioning, smaller feeds and patient burping — not medication. Be kind to yourself, accept that there will be laundry, and remember the wave passes. If you're struggling, your Maternal & Child Health Nurse is one phone call away.

Trusted Australian sources for further reading

Raising Children Network — Australia's government-funded parenting site, packed with evidence-based articles and short videos.
Royal Children's Hospital Melbourne — Kids Health Info — clinician-written fact sheets covering common newborn and toddler concerns.
Australian Breastfeeding Association (ABA) — free helpline on 1800 686 268, seven days a week, staffed by trained breastfeeding counsellors.
Pregnancy, Birth and Baby — free telehealth advice on 1800 882 436.
healthdirect 13HEALTH — registered nurse advice 24/7 (1800 022 222 in most states).
Tresillian & Karitane — free or low-cost sleep, settling and parenting support across NSW, ACT and increasingly nationwide.
Red Nose Australia — current safe-sleep guidance for every age and stage.

A note from our Maternal Health Nurse team

This article was reviewed by a registered Australian Maternal & Child Health Nurse on our editorial team. Our goal is to give you calm, accurate, evidence-based information that respects your instincts and your family's individual circumstances. We do not replace your own GP, MCH nurse, paediatrician or other treating clinician — but we hope we make the in-between moments easier.

If you'd like personalised guidance, our care plans are written by a registered Maternal Health Nurse and delivered to your inbox within 24 hours. They cover sleep, feeding, settling, behaviour and developmental concerns. Free tools — including our Baby Tracker, Sleep Coach and Ask Genie AI Midwife — are always available with a free account.

Above all, trust yourself. You know your baby better than anyone in the world.