A temperature of 38°C degrees Celsius (100.4°F) or above is high for a child.
High temperatures are often caused by common illnesses like colds, flus or mild infections. They usually get better within 3 days.
It's important to keep a close eye on your child and talk to your GP if you think their temperature could be something more serious.
Find out what to do if your child has a high temperature from UndertheWeather.ie
When to check your child's temperature
You should check your child’s temperature if they:
- have flushed cheeks
- feel hotter than usual on their chest, forehead, back or stomach
- are sweaty
- are more irritable than usual
How to check your child's temperature
The best way to check your child's temperature is with a digital thermometer. Ear or strip thermometers may not be as accurate.
You can buy a digital thermometer at a pharmacy, supermarket or online. The thermometer will come with instructions.
Do not take your child's temperature immediately after a bath or when they're wrapped in warm clothing, as you will not get an accurate result.
Do not use a mercury thermometer
Never use a mercury thermometer. They can break, exposing your child to glass splinters and mercury which is highly poisonous.
If your child is exposed to mercury
Call 01-8092166 immediately if your child is exposed to mercury. The Poisons Information Lineis open every day between 8am and 10pm.
Contact your nearest hospital emergency department (A&E) that treats children or call 999 if your child comes into contact with mercury outside of these hours.