What Is Silent Reflux?

Ordinary infant reflux (gastro-oesophageal reflux, or GER) happens when milk and stomach contents travel back up the food pipe, usually resulting in visible spit-up. It’s extremely common and, in most babies, entirely normal, a result of the valve between the stomach and food pipe still being immature.

Silent reflux works differently. Instead of coming all the way back up and out, the stomach contents travel up the food pipe and are swallowed back down again, sometimes reaching the back of the throat, voice box, or nasal passages. Because nothing visibly comes out, parents (and sometimes even healthcare professionals on a first look) can miss it entirely. Medically, this is sometimes referred to as laryngopharyngeal reflux (LPR).

The discomfort is just as real as with typical reflux. It’s simply invisible.

Signs of Silent Reflux Parents Often Miss

Because there’s no obvious spit-up to point to, silent reflux tends to show up through behaviour and feeding patterns instead. Signs worth paying attention to include:

• Frequent crying or fussiness during or after feeds, without an obvious cause
• Arching the back, especially during or right after feeding
• Difficulty settling after a feed, even when your baby seems otherwise fed and comfortable
• Refusing the breast or bottle, or feeding for a very short time and pulling away
• Frequent hiccups or a chronic cough
• A hoarse cry or noisy breathing
• Poor sleep, particularly waking distressed shortly after being laid down
• Bad breath or frequent swallowing, as the stomach contents are brought back up and re-swallowed

None of these signs on their own automatically means silent reflux — babies cry, arch, and feed unpredictably for all sorts of reasons. But when several of these show up together, especially clustered around feeding times, it’s worth mentioning reflux specifically to your GP or health visitor, rather than assuming it’s “just” a fussy baby or colic.

Why It’s Easy to Miss

Silent reflux is harder to spot for a simple reason: the marker most of us associate with reflux — visible spit-up — is missing. A baby with silent reflux is sometimes described as being in more discomfort than a baby with typical reflux, precisely because nothing is coming up to relieve the pressure. It’s also easily mistaken for colic, general fussiness, or a difficult feeder, which means it can go unaddressed for longer than more visible reflux.

What Actually Helps

As with typical reflux, most babies with silent reflux improve with simple, practical changes rather than medication — though it’s always worth discussing persistent symptoms with your GP or paediatrician before assuming any single fix will solve it.

Feeding adjustments

• Offering smaller, more frequent feeds rather than large ones can ease pressure on the stomach.
• Taking time to burp your baby thoroughly, both during and after feeds, helps release swallowed air that can worsen symptoms.
• If bottle feeding, paced feeding and a slower-flow teat can reduce the amount of air swallowed.
• If you’re breastfeeding, there’s usually no need to change what or how you feed — breast milk is naturally less acidic than formula, so when it is brought back up it’s gentler on your baby’s throat and food pipe.
• If your baby is on formula, ask your GP or paediatrician about thickening it (with a small amount of rice cereal, or an anti-reflux/AR formula) to a yoghurt-like consistency. Thickened feeds are more likely to stay down in the stomach through gravity rather than washing back up, and this is one of the most consistently recommended changes for formula-fed babies with reflux.

Positioning

• Keeping your baby upright during feeds, and for a period afterwards, is one of the most consistently recommended approaches — it uses gravity to help keep stomach contents down rather than fighting against a flat or reclined position. Many paediatricians encourage keeping baby upright as much as possible through the day, not just after feeds — wearing your baby in a carrier or sling is one practical way to do this.
• This is exactly the thinking behind BabyUp®’s 70° incline: designed to replicate the upright, shoulder-held position parents instinctively use to settle a baby after feeding, so your arms can get a break without losing that upright support.

Feeding source

• Silent reflux itself isn’t caused by a food allergy or by the type of milk your baby is on, and it’s largely hereditary rather than diet-related — it’s worth knowing this, because reflux and cow’s milk protein allergy (CMPA) are often confused. 
• Reflux is common, affecting a large proportion of babies to some degree, while true CMPA is uncommon, affecting under 3% of babies, and looks quite different: it tends to appear within the very first few bottles, with repeated vomiting, abdominal pain, watery stools, and hives, rather than the gradual, feed-related fussiness typical of reflux. 
• If your baby doesn’t show that distinct pattern, an elimination diet is unlikely to help and isn’t something to start on suspicion — unnecessary elimination diets can create nutritional gaps and unnecessary stress around feeding, without addressing the reflux itself. 
• If you do have concerns, that’s a conversation for your GP or paediatrician rather than a change to make on your own.

Wondering if your baby’s symptoms could be linked to reflux?

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Medication

• Feeding and positioning changes are important, but for some babies they only go part of the way. If your baby is still clearly uncomfortable despite these adjustments, it’s worth asking your GP or paediatrician about medication — typically starting with an antacid, which is considered safe for regular use in infants, with a stronger acid-reducing medicine added for a period if needed. 
• A baby who is growing well is not a reason to rule out treatment — ongoing discomfort on its own is a reasonable reason to ask about it.

When to see a doctor Most reflux, silent or otherwise, resolves on its own as your baby’s digestive system matures, typically improving significantly by 9-12 months. However, you should speak to your GP or paediatrician promptly if your baby:

• Isn’t gaining weight as expected
• Refuses feeds consistently
• Has forceful or projectile vomiting
• Shows signs of blood in vomit or stool
• Has ongoing noisy breathing, a persistent cough, or breathing difficulties

These can be signs of something that needs a closer look, rather than reflux alone.