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Over 38°C means a fever

If your child has a fever, he or she will have a body temperature above 38˚C. Your child may also feel tired, look pale, have a poor appetite, be irritable, have a headache or other aches and pains and feel generally unwell. Take the temperature from the armpit (don’t use in the mouth of under 5s). However, bear in mind that these measurements are less accurate as the armpit is slightly cooler.

A fever is part of the body’s natural response to infection and can often be left to run its course provided your child is drinking enough and is otherwise well. If your child is having trouble drinking, trying to reduce their temperature may help with this. This is important in preventing your child from becoming dehydrated, which can lead to more serious problems. As a guide, your child’s urine should be pale yellow - if it is darker, your child may need to drink more fluids.

Fevers are common in young children. They are usually caused by viral infections and clear up without treatment. However, a fever can occasionally be a sign of a more serious illness such as a severe bacterial infection of the blood (septicaemia), urinary tract infection, pneumonia or meningitis.

You should also contact your GP if fever symptoms are not improving after 48 hours. Check your child during the night.

Always seek medical advice if your child develops a fever soon after an operation, or soon after travelling abroad.

GP says

Parents or carers looking after a feverish child at home should:

Source: NICE, Feverish illness in children

Babies under 6 months:

Always contact your GP, Health Visitor, Practice Nurse, Nurse Practitioner or local clinic GP if your baby has other signs of illness, as well as a raised temperature and/or if your baby’s temperature is 38˚C (102˚F) or higher.

Older children:

A little fever isn’t usually a worry. Contact your GP if your child seems unusually ill, or has a high temperature which doesn’t come down.


My toddler is hot and grumpy.


Have you tried infant paracetamol? Have you made sure they are drinking lots of fluids?


If their temperature remains over 38˚C and doesn’t come down, contact your GP.

Source: DoH Birth to five edition 2009.