Written by the team at The Baby Element Clinic, Wilmslow. Last updated: 18th August 2025.
As a parent, seeing your little one uncomfortable or in pain is distressing. One of the most common concerns we see from parents in our Wilmslow clinic is baby reflux. You’ve likely heard the term “acid reflux,” picturing tiny tummies full of harsh acid causing your baby pain.
But what if we told you that for most infants, acid isn’t the primary culprit?
This guide will walk you through the real causes of infant reflux, explain the symptoms, and offer gentle, practical solutions to help soothe your baby.
At its core, infant reflux or baby reflux, or Gastroesophageal Reflux (GER), is the simple movement of stomach contents back up into the esophagus (the food pipe). It’s primarily a mechanical issue, not a chemical one.
Imagine the valve at the top of the stomach—the lower esophageal sphincter (LES). In adults, it’s a strong, one-way gate. In babies, however, this valve is still immature and weak. Because babies have a liquid diet and spend so much time lying down, it’s incredibly easy for milk to flow back up.
This is why so many babies spit up—it’s a completely normal part of their development.
Here’s the key fact that often gets overlooked: a baby’s stomach is not as acidic as an adult’s. The contents that come back up are often just milk mixed with digestive enzymes.
This is why conditions often labelled “silent reflux”—where a baby shows signs of discomfort like arching their back or crying during feeds without much spit-up—are often misunderstood. The discomfort typically comes from:
Volume: A large amount of milk moving up and down the short esophagus can be distressing.
Irritation from Enzymes: A digestive enzyme called pepsin can cause inflammation in the esophagus, even without high levels of acid.
Mechanical Discomfort: The repeated action of refluxing can be physically uncomfortable for a baby.
This is a key reason why medications designed to reduce stomach acid don’t always resolve the symptoms of baby reflux. If the problem isn’t excess acid, an acid-suppressing medicine won’t fix the root mechanical cause.
Q: Is reflux the same as colic? A: While they can have overlapping symptoms like excessive crying, they are different. Colic is defined by long periods of crying without a known cause, whereas reflux is a mechanical issue of stomach contents coming back up. Often, uncontrolled reflux can lead to colicky symptoms.
Q: Will my baby grow out of reflux? A: For some babies, yes, some babies grow out of reflux by their first birthday. As their digestive system matures, they start sitting up, and begin eating solids, the symptoms naturally resolve.
It really depends on the cause of the reflux symptoms, and if they are problematic, many reflux cases can be resolved after a feeding assessment discovers the causes.
Q: When should I see a doctor for my baby’s reflux? A: While most reflux is normal, you should get a full functional feeding assessment by a Lactation Consultant, and also contact your GP or health visitor if your baby is projectile vomiting, has green or yellow vomit, has blood in their spit-up, is refusing feeds, or is not gaining weight.
Understanding that most infant reflux is a mechanical issue helps us focus on practical solutions that support your baby’s developing system.
A Parent’s Guide to Baby Reflux can help.
Master Upright Positioning: Keep your baby in a biological breastfeeding position or upright like koala hold during feeds and for at least 20-30 minutes afterward. Gravity is your best friend in managing reflux symptoms!
Try Paced Bottle Feeding: If you’re bottle-feeding, use a slow-flow teat and practice paced feeding. This helps prevent them from gulping air, which can worsen gas and reflux.
Wind Your Baby Effectively: Burp your baby frequently—before, during, and after feeds. Releasing trapped air frees up space in their tiny tummy.
Consider Bodywork: Gentle, non-invasive therapies like paediatric osteopathy can be incredibly beneficial. A trained practitioner can help release tension in your baby’s body that may be contributing to the mechanical issues of reflux.
Assess Oral Motor Function and a Tongue-Tie check: An undiagnosed tongue-tie can affect feeding, causing a baby to swallow excess air. If you’re struggling with feeding, we always recommend a full functional assessment, sometimes it is the way baby uses their muscles to coordinate drinking which is contributing to reflux episodes.
Adjust Feed Sizes: Offering smaller, more frequent feeds can put less pressure on their developing sphincter, reducing the likelihood of spit-up.
Ensure Safe Sleep: Always place your baby on their back on a firm, flat surface to sleep. Never use pillows or wedges to incline your baby in their cot, as this is not a safe sleep practice.
I feel it is important for you know this; YOU are the expert on your baby.
You spend 24 hours a day caring for them, nurturing them and are wholly invested in their health and wellbeing.
The person you seek support from should listen to those concerns, and help work through the symptoms, watch a full feed and do a functional assessment to find out why your baby is uncomfortable.
Navigating baby reflux can be a challenging journey. Remember, for most babies, this is a temporary and normal developmental phase.
If you are concerned about your baby’s feeding or comfort, please reach out. You know your baby best. For a specialist assessment, you can book a consultation with our paediatric specialists here.
