Child Fever in Australia: When to Worry, When to Watch
Fever is one of the most common reasons Australian parents seek medical advice, and one of the most worried-about. The good news, repeated by every paediatric source we trust, is that the temperature itself is rarely the dangerous thing. Fever is the body doing its job. It's how the immune system responds to infection, usually a viral one, and the height of the temperature alone is a poor predictor of how unwell a child actually is.
What matters more is how the child looks and behaves. A child with a temperature of 39.0°C who is drinking, smiling between miserable patches, and able to be settled is in a very different situation from a child of 38.0°C who is drowsy, refusing fluids, and breathing fast. The Royal Children's Hospital Melbourne is unambiguous on this point: the child's overall condition matters more than the number on the thermometer (Royal Children's Hospital Melbourne, 2026).
The plain-English version is this. In a child over three months of age, fever during an obvious cold or virus, with a child who's still drinking, weeing, and engaging with you between doses of paracetamol or ibuprofen, is usually safe to manage at home. Fever in a baby under three months, or with any of the red flags in section three, is not. That distinction is what this guide is built around.
This piece walks through what counts as a fever by age, the red flags that mean urgent in-person care, what helps at home, when telehealth fits the picture, and when it doesn't.
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A fever is generally defined as a body temperature of 38.0°C or higher. The way you measure it matters, and what it means depends on the child's age.
Infants under three months. Any temperature of 38.0°C or higher in a baby under three months is considered an emergency, full stop. This isn't to scare parents, it's because young babies can become seriously unwell quickly and the usual signs of severe infection can be subtle. Healthdirect, the Royal Children's Hospital, and Better Health Channel all give the same advice: a fever in a baby under three months needs same-day in-person medical assessment, usually at a hospital emergency department (Healthdirect, 2026; Royal Children's Hospital Melbourne, 2026; Better Health Channel, 2026). Telehealth is not the right setting for this age group with a fever. If your baby is under three months and has a fever, call 000 or go to the nearest emergency department.
Babies three to six months. A fever in this age group still warrants same-day medical advice. A GP, after-hours service, or emergency department is appropriate depending on how the baby looks. The threshold for in-person review is lower than in older children.
Children over six months. Fever in this age group is usually viral and usually settles within three to four days. The number on the thermometer matters less than how the child looks. A child who looks reasonable between fever spikes, is drinking, weeing, and engaging, can usually be watched at home. A child who looks unwell, regardless of the temperature, needs medical review.
How to measure. Most home thermometers in Australia are digital, used in the armpit (axillary) or ear. Forehead and temporal scanners are convenient but slightly less accurate. The brand and method don't change the threshold of 38.0°C. If the reading is borderline and the child looks unwell, treat it as a fever and act on the picture rather than the digit.
A note on febrile convulsions. Some children, usually between six months and six years, have a brief seizure with a fever. They're frightening to witness but most are short and most don't cause harm. Any child who has a febrile convulsion should be seen on the day, and any first-time seizure should be assessed in person.
These are the situations where a phone call to triage, a GP, or an ambulance trumps anything else, including reading the rest of this article.
Call 000 or go to the nearest emergency department immediately if:
- Your child is under three months old and has a fever of 38.0°C or higher
- Your child is severely breathless, breathing very fast, or struggling to breathe (the chest sucking in, nostrils flaring, blue or grey lips)
- Your child is drowsy, floppy, or hard to wake
- Your child has a stiff neck, severe headache, or a non-blanching rash (tiny red or purple spots that don't fade when pressed with a glass)
- Your child has a seizure (especially a first-time seizure, or any seizure lasting more than five minutes)
- Your child shows signs of severe dehydration: very dry mouth, no wet nappies for more than 8 hours, sunken eyes, no tears when crying, or extreme lethargy
- Your child is in significant pain that isn't relieved by basic measures
- You feel something is seriously wrong, even if you can't pinpoint what
That last point matters. Parents are usually right when they feel their child is more unwell than the temperature suggests. Australian emergency departments and GPs are familiar with that instinct and take it seriously.
Same-day GP or after-hours service if:
- Fever has lasted more than 48 hours without improving
- Your child has a fever and a new rash that does fade with pressure (often viral, but worth a look)
- Your child has fever plus pain (ear, throat, abdomen, urinating)
- Your child has a known underlying condition (immune issues, complex medical history) and a fever
- Your child is increasingly unwell rather than improving
If you're ever unsure where to go, Healthdirect's nurse advice line on 1800 022 222 is a free, 24/7 Australian service that can help you decide between home, GP, after-hours, or emergency department. The Royal Children's Hospital Melbourne and Healthdirect both maintain detailed parent-facing guidance on fever red flags that's worth bookmarking (Royal Children's Hospital Melbourne, 2026; Healthdirect, 2026).
For an otherwise well child over six months with a typical viral fever, home care is usually the right plan.
Keep them comfortable. A child with a fever often feels alternately too hot and too cold. Light clothing and a single sheet are usually enough. Don't bundle a feverish child up in heavy blankets, and don't strip them down to nothing in a cool room.
Fluids first. Frequent small sips of water, breastmilk, formula, or oral rehydration solution matter more than food. A feverish child usually isn't very hungry, and that's okay for a few days. What matters is that they're peeing, with reasonably wet nappies or normal toilet trips.
Rest. Quiet activity, screens, books, naps. There's no need to force sleep or activity.
Paracetamol or ibuprofen. Both are common over-the-counter options for child fever in Australia. They can reduce fever and ease the discomfort that often comes with it (sore throat, headache, body aches). They're not a cure for the underlying virus and don't reduce illness duration. The Royal Children's Hospital Melbourne and Healthdirect both note that the goal is comfort, not chasing a particular number on the thermometer (Royal Children's Hospital Melbourne, 2026; Healthdirect, 2026).
A few important notes:
- Always follow the dosing instructions on the bottle for your child's weight and age. We don't include weight-based mg per kilogram dosing here, because dosing should come from your GP, the bottle's instructions, the Royal Children's Hospital fact sheet, or Healthdirect.
- Aspirin is not recommended in children for fever in Australia.
- If you're combining or alternating paracetamol and ibuprofen, do that on the advice of a GP or the bottle's directions, not on a hunch.
- If your child is vomiting and can't keep oral medication down, or has a condition where these medications aren't suitable, ask a GP.
What doesn't help. Cold baths, ice packs, alcohol rubs, and aggressive sponging can shock the child, cause shivering (which raises the temperature further), and don't speed recovery. Don't do them.
Telehealth has a real, useful role in childhood fever, and a clear edge of where it stops being the right tool.
Telehealth fits well when:
- Your child is over three months old and looks reasonable between fever spikes
- You'd like a clinical opinion on whether to watch at home or seek in-person care
- You've already seen someone, the picture is settling, and you'd like a follow-up
- You need a medical certificate for school or childcare
- You're after a repeat prescription for something stable
- You're worried, and want a calm conversation rather than a long wait at after-hours
Telehealth is the wrong tool when:
- Your child is under three months old and has a fever
- Any of the red flags in section three apply
- Your child needs a physical examination of the chest, ears, throat, abdomen, or skin in detail
- You're seeking an urgent assessment and the clinician will almost certainly tell you to go to an emergency department
- The situation has escalated since you booked
A good GP, in person or online, will tell you when in-person care is the right next step. That referral isn't a failure of the telehealth model. It's the model working.
Online appointments for unwell children
Abby Health is an online-first clinic where Australian GPs see family and kids patients seven days a week. Childhood fever is one of the most common reasons parents book an appointment, and online care fits well into the rhythm of family life when used in the right situations.
The format suits a particular slice of fever care: the early "is this serious or not?" conversation in an otherwise well child over six months, follow-ups after another assessment, medical certificates for school or childcare, and the conversation about when to escalate. Continuity matters. The next time you see an Abby GP, your child's history is already in front of them, so you're not retelling the story to a stranger at midnight. Abby AI, our medical AI, supports the doctor by surfacing that context before the consult, never replacing clinical judgment.
For babies under three months with fever, for the red flags in section three, and for any child who looks seriously unwell, in-person care is the right call. Use 000, the nearest emergency department, or Healthdirect's 1800 022 222 nurse advice line.
Abby Health is bulk billed for eligible patients with a valid Medicare card. Strict eligibility criteria apply. To start, schedule an appointment, or if your child needs a repeat for something already prescribed, ask about an online prescription. For other common kids' issues, see our guide to ear infections in children.
Is a high temperature dangerous on its own?
In an otherwise well child over six months, the height of the temperature is rarely the danger. How the child looks and behaves matters more. Australian guidance is to focus on comfort and overall condition rather than chasing a number.
How long is too long for a fever?
A typical viral fever in a child usually settles within three to four days. A fever lasting more than 48 hours, or one that's getting worse rather than better, is worth a GP review.
Can fever cause brain damage?
No. The temperatures the body produces during a normal infection don't reach levels that cause brain damage. The exception is heat stroke, which is environmental, not infection-driven, and is a different situation.
Should I alternate paracetamol and ibuprofen?
Sometimes, but only on the advice of a GP, the bottle, or a paediatric source like the Royal Children's Hospital. Don't improvise dosing schedules.
My child looks better when their fever comes down. Does that mean it's nothing serious?
A child who looks reasonably well between fever spikes is reassuring. A child who looks unwell *even when* the temperature is back down is the one to act on quickly.
My baby is under three months and has a fever. Can I just call a GP first?
Go straight to the nearest emergency department or call 000. Fever in a baby under three months is one of the few situations where the right answer is hospital, not GP, and not telehealth.
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