It often happens in the middle of the night. You lean in to settle your baby and their forehead feels hot, their cheeks are flushed and they're grizzlier than usual. A fever can rattle even the calmest parent, so it really helps to know ahead of time what the numbers mean, how to check properly and which signs need a doctor straight away.
Quick answer: For babies, a fever usually means a temperature of 38°C or higher. When it comes to baby fever, when to worry depends mostly on age and behaviour: a baby under 3 months with 38°C or more, or a baby aged 3–6 months with 39°C or more, needs prompt medical advice. At any age, a baby who is floppy, hard to wake, struggling to breathe or has a rash that doesn't fade when pressed needs emergency help.
What Counts as a Fever in a Baby?
A normal temperature for a baby sits roughly between 36.4°C and 37.5°C, and it naturally rises and falls a little through the day. Most doctors consider 38°C or above a fever. Anything between about 37.5°C and 38°C is worth keeping an eye on, but it isn't usually a fever in itself.
It helps to remember that a fever is not an illness. It's the body's normal, healthy response to fighting an infection, most often a common virus. The number on the thermometer matters, especially for young babies, but how your baby is behaving tells you far more than the reading alone.
How to Take Your Baby's Temperature Accurately
Use a digital thermometer
- Under the arm (axillary): the method the NHS recommends for children under 5. Place the tip in the centre of the armpit, hold your baby's arm gently against their side and wait for the beep.
- Rectal: some paediatricians, including many who follow American guidance, prefer this for young babies because it is the most accurate. Only do it if your doctor has shown you how.
- Ear and forehead scanners: quick and convenient for older babies and toddlers, though readings can vary with technique.
Avoid taking a reading straight after a bath or a long cuddle under a blanket, as this can push the number up temporarily.
Where fever indicator stickers fit in
Temperature indicator stickers are a handy early warning, especially overnight or when you're out. Our animal-shaped fever indicator stickers (AED 49 for a pack of 5) give you a quick visual cue that your baby may be running warm. Treat them as a screening aid only: if a sticker suggests a raised temperature, always confirm it with a proper digital thermometer before deciding what to do.
Baby Fever: When to Worry and When to Call the Doctor
Young babies can become unwell quickly and may not show typical signs of infection, which is why age is so important.
- Under 3 months: a temperature of 38°C or higher needs urgent medical advice, even if your baby otherwise seems fine.
- 3 to 6 months: contact your paediatrician promptly if the temperature is 39°C or higher.
- Any age: call your doctor if a fever lasts five days or more, or if you simply feel something isn't right. Your instinct counts.
Emergency signs at any age
Call an ambulance on 998 or go straight to the nearest emergency department if your baby:
- Is floppy, unusually drowsy or very hard to wake
- Has a rash that doesn't fade when you press a clear glass against it
- Is breathing very fast, grunting, or you can see the skin pulling in under the ribs
- Has blue, grey, very pale or blotchy skin, lips or tongue
- Has a seizure (fit) for the first time, or one lasting longer than five minutes
- Has a stiff neck or a bulging soft spot on the head
- Shows signs of dehydration: far fewer wet nappies, a dry mouth, no tears or a sunken soft spot
- Has a weak, high-pitched or continuous cry that's different from normal
Why Babies Get Fevers
Most fevers in babies and toddlers are caused by viral infections such as colds, flu or tummy bugs, and they settle within a few days. Ear infections, chest infections and urine infections are other common causes, and these may need treatment, which is another reason young babies with a fever should be checked.
A mild temperature can also follow routine vaccinations and usually passes within a day or two. In the UAE, it's also worth thinking about heat: an overdressed baby, a hot car or a long afternoon outdoors can raise body temperature. That's overheating rather than a true fever, but it still matters. A baby who is very hot, lethargic and not sweating after heat exposure needs urgent medical care.
How to Keep a Feverish Baby Comfortable at Home
If your baby is otherwise alert, feeding and doesn't have any warning signs, you can usually care for them at home while keeping a close eye on things.
- Keep feeds coming. Offer the breast or bottle little and often. Older babies can also have sips of water. Fluids matter more than food.
- Dress them lightly. A vest or light sleepsuit is usually plenty. Don't bundle a feverish baby up, and don't strip them completely either.
- Keep the room comfortable. A comfortably cool room helps. There's no need to crank the air conditioning down, but avoid a stuffy space.
- Skip cold baths and sponging. Cold water can make babies shiver, which actually raises body temperature and makes them miserable.
- Check on them through the night. Keep following safe sleep guidance, including placing your baby on their back in their own cot.
Some parents find a gentle cooling patch soothing. The Turtees fever cooling patch for babies is gentle on infant skin and simply peels and sticks onto the forehead. It's there for comfort only: it won't treat whatever is causing the fever, so keep watching your baby and follow the pack instructions.
Fever Medicine for Babies: What to Know
Paracetamol and ibuprofen can help a baby who is uncomfortable or distressed, but they aren't always needed just to bring the number down. Mainstream guidance generally includes:
- Paracetamol is usually suitable from 2 months, and ibuprofen from 3 months, subject to weight and whether your baby was born prematurely.
- Always dose by your baby's age and weight, and use the syringe or spoon that comes with the medicine.
- Don't give paracetamol and ibuprofen together unless your doctor advises it.
- Never give aspirin to babies or children.
If your baby is under 3 months or you're unsure about a dose, speak to your paediatrician or pharmacist first.
Baby Fever, When to Worry: A Quick Reference Table
| Situation | What to do |
|---|---|
| Under 3 months, 38°C or higher | Get medical advice urgently |
| 3–6 months, 39°C or higher | Contact your paediatrician promptly |
| Fever with any emergency sign listed above | Call 998 or go to emergency |
| Fever lasting 5 days or more | See your doctor |
| Alert, feeding well, mild fever, older than 6 months | Care at home, keep fluids up, keep watching |
If your baby's fever comes with a blocked nose, our guide on helping a congested baby breathe and sleep better has gentle tips for easier nights, and our newborn safe sleep guide covers how to keep sleep safe when your little one is poorly.
Frequently Asked Questions
Is 37.8°C a fever in a baby?
Not quite. Most doctors define a fever as 38°C or higher. A reading of 37.8°C is slightly raised, so recheck in a little while, keep your baby lightly dressed and watch how they're behaving.
Can teething cause a high temperature?
Teething may make a baby feel slightly warm, but it doesn't cause a true fever of 38°C or more. If your teething baby has a fever, look for another cause and speak to your doctor if you're unsure.
Should I wake my baby to check their temperature?
If your baby is sleeping peacefully and breathing comfortably, rest is good for them. Do check on them regularly, and wake them if they seem unusually hot, floppy or their breathing looks laboured.
Are fever indicator stickers accurate enough on their own?
They're useful for spotting a possible temperature rise, but they aren't a replacement for a digital thermometer. Always confirm a raised reading before making decisions.
This article is for general information and isn't a substitute for advice from your doctor or paediatrician.
Knowing the answer to "baby fever: when to worry?" before you need it makes those anxious nights calmer. Keep a digital thermometer in the nursery and your paediatrician's number saved in your phone. If you'd like to put together a small at-home fever kit, you'll find our fever indicators and cooling patches at Turtees, with fast delivery across Dubai, Abu Dhabi and the rest of the UAE.
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