What can cause a fever?

While a fever can be treated, it’s important to keep in mind that fevers are usually the symptom of an illness and not the illness itself.

Here are some causes of fever:

Infection: The majority of fevers are caused by bacterial or viral infection. The body raises its temperature to help the immune system fight germs causes illness.
Immunisation: Some children can develop a fever after getting a vaccine or booster shot. This is usually nothing to worry about and your child can be soothed by measures such as cold compresses or age-appropriate medicine.
Strenuous Exercise: A child’s body temperature can rise temporarily after an enthusiastic play session or exercise.
Overdressing: Newborns and babies may develop fevers if they’re overdressed or in a hot environment. This is because their body’s aren’t able to regulate temperatures as well as older children.
Teething: This can also cause a slight rise in body temperature but not a fever.

Remember to monitor your child if they develop a fever and contact your GP if it continues or you’re worried.

More questions

Children's cough and cold medicine: what is appropriate at what age?

There are very specific guidelines when it comes to safely administering over the counter medications to babies, toddlers and preschoolers.

What is fever?

Fever is often the first sign of an illness in children. When your child has a temperature it can be a worrying and stressful time.

How do I tell if my baby has a sore throat?

Sore throats and coughs are two very common illnesses for children.

Which is better for my baby’s temperature – ibuprofen or paracetamol?

Once you have established your baby has a fever and have taken practical measures, such as placing them in a cooler environment, to combat this, a fever-reducing medication can be administered.

What is Febrile Convulsion?

Febrile convulsions are caused by a rapid increase in the body temperature of young children.

How should I treat my baby’s fever?

Once you have established your baby has a slight fever, there are a number of measures you can take to keep it under control

Are there ways to treat my baby’s fever without using medication?

If your baby has a slight fever, there are a number of measures you can take to keep it under control.

How do I know when a fever is serious?

The average body temperature should be between 35°C and 37°C.

What can cause a fever?

While a fever can be treated, it's important to keep in mind that fevers are usually the symptom of an illness and not the illness itself.