Spit Happens: Telling Normal Possetting From Reflux — and When to Get Help

It’s 2am, you’ve just finished a feed, and there’s a warm trickle down your shoulder. Cue panic? Usually not. Most babies posset — sometimes a lot — and are completely unbothered by it. But if your baby is arching, crying, refusing feeds or not gaining weight, it’s worth knowing what to look for. This is general information, not a diagnosis, and your health visitor or GP is the right person to assess your baby properly.

What’s actually normal?

Possetting is bringing up small amounts of milk, often with a burp. It tends to be effortless and your baby stays content. It happens because the valve at the top of a baby’s stomach is still loose and learning to do its job. As your baby grows and spends more time upright, it usually settles.

Some babies posset after every feed and still thrive. If your baby is happy, growing along their centile and having plenty of wet nappies, the main problem is usually the laundry — not their health.

Reflux versus possetting: what’s the difference?

Reflux is when stomach contents come back up. That can look exactly like possetting. The difference is whether it bothers your baby. If they are bringing up milk but are otherwise comfortable, that’s common and usually manageable at home.

Reflux becomes more of a concern when it causes symptoms: frequent large vomits, crying during or after feeds, arching their back, refusing feeds, coughing or wheezing, or poor weight gain. Some babies are diagnosed with GORD — gastro-oesophageal reflux disease — when reflux is causing complications. That’s less common and needs medical assessment.

Silent reflux: when the spit stays put

‘Silent reflux’ is a label many parents use when a baby seems uncomfortable but doesn’t bring much milk up. You might notice hiccups, coughing, arching, unsettled feeds or a baby who seems to be swallowing something back down. There’s no simple test for it, and it shouldn’t be self-diagnosed. If you’re seeing a pattern that worries you, talk it through with your health visitor or GP so other causes can be ruled out.

Practical things to try at home

You don’t need to overhaul everything overnight. Small changes often take the edge off.

• Try smaller, more frequent feeds if your baby takes a lot very quickly. Some babies do better with less volume at each feed.
• Pace bottle feeds. Keep the bottle fairly horizontal so milk just covers the teat, let your baby pause, and wind them during the feed rather than waiting until the end.
• Wind during and after feeds. Over-the-shoulder or sitting upright can both work — use whichever helps your baby.
• Hold your baby upright-ish during feeds and for a little while afterwards. Twenty to thirty minutes is often suggested, though that’s not always realistic at night. Do what you can.
• Avoid feeding lying flat. Cradle your baby with their head slightly higher than their tummy.
• Don’t add cereal or thickeners to bottles unless a healthcare professional has advised it. It isn’t a DIY fix and can be unsafe.
• Don’t force the last ounce. If your baby is turning away, stop and offer again later.
• If you’re breastfeeding, ask for help with latch and positioning if feeds feel uncomfortable or very fast. Don’t cut out foods unless you’ve been advised to.

Always follow safe sleep guidance: keep your baby on their back on a clear, flat surface, and never prop them on pillows to sleep upright.

When to ring your GP or health visitor

It’s completely reasonable to ask for help if you’re worried. Contact your health visitor or GP if your baby has reflux symptoms and:

• is not gaining weight, is losing weight or is dropping centiles
• is refusing feeds or seems to be developing a feed aversion
• is very unsettled during feeds or arching repeatedly
• has a persistent cough or wheeze
• has symptoms that are not improving as they get older
• is over 12 months and still having significant reflux

A simple diary of feeds, vomits, nappies and any symptoms can be useful at the appointment — but don’t feel you need perfect notes before you ask for help.

Red flags that need urgent help

Most reflux is not an emergency. But seek urgent medical advice — call 999 or go to A&E if your baby:

• is struggling to breathe, is floppy or unresponsive
• has vomit that is green or bloody
• is projectile vomiting repeatedly
• has a fever and is very sleepy or difficult to wake
• has signs of dehydration, such as fewer wet nappies, a dry mouth or sunken eyes
• is choking or has pauses in breathing

If you’re unsure, NHS 111 can advise on the next step. Trust your instincts: you know your baby best.

The bottom line

Spit happens. Possetting is common, reflux is common, and most babies grow out of both as their digestive system matures. Try the practical tweaks, keep an eye on weight and nappies, and ask for help if something doesn’t feel right. You don’t need to panic — but you don’t need to struggle alone either.