Baby Reflux and GERD: Symptoms, Causes, and What Actually Helps

Reflux vs GERD: what's the difference?

Reflux happens when milk travels back up from the stomach into the oesophagus. It is extremely common in the first months of life because the lower oesophageal sphincter (LES) — the valve between the oesophagus and stomach — is still immature and does not always stay closed after a feed. Add a liquid diet and a lot of time spent lying flat, and it is easy to see why milk finds its way back up.

Most babies with reflux are perfectly comfortable. They are sometimes called "happy spitters" — they spit up, shrug it off, and carry on. This is normal and typically resolves on its own by 12–18 months as the LES matures and the baby begins sitting upright and eating solids.

GERD (gastroesophageal reflux disease) is a different matter. GERD is diagnosed when reflux causes persistent discomfort, interferes with weight gain, or leads to complications such as oesophageal irritation. It is less common than simple reflux. If your baby is growing well and seems content between feeds, GERD is unlikely — but only your pediatrician can rule it out.

Common symptoms to watch for

Most symptoms of reflux are obvious, but some are easy to miss. Below are the signs that may indicate your baby is struggling with reflux or GERD:

• Frequent spitting up — small amounts of milk after most feeds.
• Arching the back during or after a feed, as if trying to pull away.
• Fussiness and crying during or immediately after feeding.
• Hiccups and wet burps — especially when accompanied by a sour smell.
• Poor weight gain — if enough milk is coming back up to affect nutrition.
• Refusing to feed — a baby who associates feeding with discomfort may pull away from the breast or bottle.

Silent reflux is a variant where milk goes up and comes back down without visible spit-up, but the stomach acid still irritates the oesophagus. Signs include unusual irritability, hoarse crying, a chronic cough or wheeze, and difficulty swallowing. Because there is nothing to see, silent reflux is frequently missed or misattributed to colic.

What causes reflux in babies?

Three factors work together to make reflux so prevalent in infancy:

• An immature LES. The muscular valve at the bottom of the oesophagus has not yet developed the tone needed to stay reliably shut after swallowing. It relaxes spontaneously, allowing stomach contents to travel upward.
• A liquid diet. Milk passes through the stomach faster than solids and is easier for a relaxed LES to let back through. Once a baby starts solid foods, the frequency of reflux usually drops.
• Lying flat most of the time. Gravity helps keep stomach contents down. Newborns spend almost all their time horizontal, giving reflux an easy path.

As babies grow — sitting up, taking solids, and spending more time upright — these factors change, which is why the vast majority of reflux resolves naturally without any medical treatment.

Practical management strategies

You cannot speed up the maturation of the LES, but there are things you can do that make a real difference to how your baby feels:

• Keep upright after feeds. Hold your baby in an upright position for 20–30 minutes after feeding. Gravity does a lot of work.
• Smaller, more frequent feeds. A fuller stomach puts more pressure on the LES. Feeding smaller amounts more often can reduce how much comes back up.
• Burp more often during feeds. Pausing to burp your baby every few minutes — rather than just at the end — releases swallowed air before it builds pressure.
• Anti-colic bottles. If bottle-feeding, vented or anti-colic bottles reduce the amount of air swallowed with each mouthful.
• Elevate the head of the mattress. Place a firm wedge under the mattress (not inside the cot) to create a slight incline. Never put anything loose inside the sleeping space.
• Avoid tight clothing around the tummy. Tight waistbands can increase abdominal pressure after feeds.

None of these require a prescription, and most parents notice an improvement within a few days of making consistent changes.

Silent reflux: the hidden struggle

Silent reflux — also called laryngopharyngeal reflux — happens when stomach contents rise into the oesophagus and then return back down before reaching the mouth. Nothing comes out, so parents often do not realise it is happening. Meanwhile, the stomach acid repeatedly irritates the throat and voice box.

The signs to look out for include:

• A persistently hoarse or raspy voice or cry.
• A chronic cough or wheeze that does not improve with typical cold remedies.
• Gagging or difficulty swallowing during feeds.
• Intense back-arching and irritability, particularly after feeds.
• Repeated refusal to feed even when clearly hungry.

Because the symptoms overlap with colic, allergies, and ear infections, silent reflux is often diagnosed late. If your baby ticks several of these boxes, mention it explicitly to your pediatrician — the management approach is the same as for visible reflux, but getting a diagnosis early prevents unnecessary distress for both baby and parent.

When to call your pediatrician

Most reflux is harmless and self-limiting, but some signs warrant prompt medical attention:

• Blood in spit-up or vomit.
• Consistent poor weight gain or weight loss.
• Choking or gagging episodes during or after feeds.
• Difficulty breathing, frequent wheezing, or a persistent cough.
• Inconsolable crying after every single feed.
• Symptoms that are getting worse rather than better after 6 months.

This article is for informational purposes only. Always consult your pediatrician before making changes to your baby's feeding routine or if you have concerns about reflux or GERD.

How tracking feeds helps identify triggers

Reflux is not always consistent — some feeds seem fine while others end in tears. Keeping a log makes it possible to spot patterns that are impossible to see in the moment.

With Bebblo you can record the time and amount of each feed, and add a quick note about what happened afterwards. After a few days of logging, patterns often emerge: maybe the evening feeds are consistently harder, or bottle feeds produce more discomfort than breastfeeds, or a particular formula brand seems to make things worse. That kind of concrete history is also exactly what a pediatrician needs when deciding whether further investigation is warranted.

Rather than trying to remember "did this happen yesterday too?", you have a timestamped record that turns vague worry into actionable information.