Vomiting in Children: How to Tell if It’s an Emergency and What to Do

When it comes to keeping little ones safe, every parent, teacher, and caregiver knows it can feel like a full-time job! In this blog series, we’ll dive into the must-know first aid for childcare and education settings—straight from a mum and registered nurse who’s seen it all, both at home and on the job. Whether it’s wrangling kids with skinned knees or managing a sudden allergic reaction, I’ve got the real-world tips (and the tales) to help you stay calm and confident when things go sideways. Let’s get started with practical, no-nonsense first aid guidance that cuts through the jargon—because when things get messy, knowing what to do makes all the difference.

It’s a scene most parents and childcare providers know all too well: one minute, a child looks slightly off, and the next, you’re scrambling to grab a bucket (or the closest towel). Vomiting in children is incredibly common, but it can leave you wondering: is this just a bug, or should we be heading to the emergency room?

Let’s face it—when emotions are running high, it can be tricky to know when vomiting is serious and when it’s not. This guide will help you navigate those queasy moments with confidence, whether you’re a new parent or someone caring for little ones in a professional capacity.


Why Do Kids Vomit, Anyway?

Kids vomit for all sorts of reasons, most of which are pretty harmless. A few usual suspects include:

  • Gastroenteritis: The classic stomach bug, often accompanied by diarrhoea and a bit of a fever.
  • Motion Sickness: Long car trips and windy roads? Not a great combo for some kids.
  • Overeating or Food Reactions: Sometimes, kids just overdo it or eat something their stomach doesn’t agree with.
  • Infections Outside the Tummy: Ear infections, chest infections, and other infections can cause vomiting.
  • Stress or Anxiety: Yes, even little ones can feel queasy when they’re stressed or overwhelmed.

Most of the time, vomiting clears up in a day or two, and there’s no need to panic. But sometimes, it’s a signal that something more serious is going on.


When Should You Worry? Red Flags.

a red flag

It’s not always easy to tell when vomiting is crossing into emergency territory. Here’s a handy checklist of warning signs to watch for:

1. Dehydration

This is one of the biggest risks when kids are throwing up. Little bodies lose fluids fast, and dehydration can sneak up on you. Look for:

  • Dry lips or mouth.
  • No tears when they cry.
  • Fewer wet nappies (or little to no wee in older kids).
  • Sunken eyes or a sunken soft spot on a baby’s head.
  • Unusual lethargy or crankiness.

If you’re seeing any of these signs, it’s time to act and seek medical assistance. 

2. Projectile Vomiting in Babies

If your newborn is doing serious projectile vomiting—like, the kind that arcs across the room—it could be pyloric stenosis, a rare but urgent condition that affects the stomach’s opening.

3. Severe Belly Pain

A bit of tummy pain is normal when kids are sick, but severe or persistent pain? That’s a red flag. It could be appendicitis, an intestinal blockage, or something else needing quick attention.

4. Vomiting After a Head Injury

If a child vomits after a bump to the head, especially more than once, it’s time to see a doctor. This could be a sign of concussion or more serious brain injury.

5. Green or Yellow Vomit

Greenish or yellowish vomit (bile) could mean there’s a blockage in the gut. It’s not something to wait out—get medical help straight away.

6. Blood in Vomit

Blood-streaked vomit or something that looks like coffee grounds might point to bleeding in the stomach or throat.

7. Other Worrying Symptoms

If vomiting is paired with a stiff neck, rash, high fever, or unusual drowsiness, it could be a sign of something serious like meningitis.

If you see any of these red flags, or you are particularly worried, get medical help. Don’t wait it out. 


First-Aid Basics for Vomiting

If none of the red flags apply, there are plenty of things you can do to help your little one feel better while they recover.

Keep Fluids Up

The golden rule for vomiting? Prevent dehydration. Small, frequent sips are your best friend here:

  • Oral Rehydration Solutions (ORS): These are lifesavers for rehydrating kids. You can pick them up at any pharmacy (look for brands like Hydralyte).
  • Clear Liquids: Water or diluted juice can work for older kids, but steer clear of sugary or fizzy drinks—they’re not great for upset tummies.
  • Ice chips: crush some ice cubes and have older kids suck on these.
  • Breastfeeding or Formula: Keep offering these if your baby is still feeding.

Pro tip: Wait about 15–30 minutes after a vomiting episode before offering fluids. Going too soon can irritate their tummy and start the cycle all over again.

glass of water

Rest the Stomach

Once the vomiting has stopped for a bit, you can start offering food. Stick to bland options like crackers, bananas, or plain rice at first. Avoid anything rich, spicy, or fatty until their stomach settles.

Watch and Wait

Most kids bounce back quickly from a vomiting bug, but keep a close eye on them. If they seem unusually tired, aren’t drinking enough, or develop any of those red-flag symptoms, it’s time to get help.


When to Call Triple Zero (000)

It’s always better to be safe than sorry. Call 000 for an ambulance if:

  • The child is unresponsive or very hard to wake.
  • They’re struggling to breathe.
  • Vomiting happens after a severe allergic reaction (think swelling of the face or tongue).
  • They have a seizure.

Seeking Extra Advice

Not quite sure if it’s an emergency? You’ve got options:

  • Healthdirect Australia: Call 1800 022 222 to speak with a registered nurse 24/7.
  • GP or Paediatrician: If you’re worried but it’s not an emergency, a doctor can help you figure out what’s going on.
  • Poisons Information Centre: If you think the vomiting might be due to swallowing something toxic, call 13 11 26 immediately.

Prevention Tips

While you can’t stop every tummy bug or bout of car sickness, there are a few things you can do to reduce the chances of vomiting:

  • Teach kids to wash their hands regularly to prevent the spread of bugs.
  • Store and prepare food safely to avoid foodborne illnesses.
  • Stick to age-appropriate portion sizes to avoid overfeeding.
  • Make sure your kids are up-to-date with their vaccines, including the rotavirus vaccine, which protects against a nasty type of gastro.

Take a Deep Breath

Vomiting is messy, exhausting, and let’s be honest, a bit stressful—especially when you’re not sure if it’s serious. The good news is that most cases are manageable at home with some TLC and a bit of patience.

When in doubt, trust your instincts and don’t hesitate to ask for professional advice. After all, keeping kids safe and healthy is what it’s all about. And hey, it’s always worth having an extra bucket or two handy—you never know when you might need it!


a kid sick with a few buckets lined up

Managing vomiting and related emergencies doesn’t have to be overwhelming—proper training can make all the difference. First aid courses often include guidance on responding to common childhood illnesses, equipping you with the confidence to act quickly and appropriately when needed. At My First Aid Course Brisbane, we offer nationally recognised childcare first aid training that covers a range of topics, including how to handle vomiting, dehydration, and other child health emergencies. Our courses are practical, easy to follow, and tailored for parents, carers, and educators. With our training, you’ll learn not just how to respond in the moment, but how to recognize warning signs and prevent complications, ensuring children in your care stay safe and well.

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