A fever itself is not dangerous and does not need to be brought down for its own sake. Treat the child's discomfort, keep fluids going, and watch for the specific warning signs.
- Give paracetamol or ibuprofen if they are distressed, not simply because the number is high. Follow the dose on the bottle for their age and weight.
- Keep fluids going. Small amounts often.
- Do not overwrap and do not sponge with cold water.
- Check on them overnight.
Get urgent help for:
- A rash that does not fade when a glass is pressed against it.
- Difficulty breathing, grunting, or drawing in under the ribs.
- A baby under three months with a temperature of 38C or more.
- Unusual drowsiness, floppiness, or being difficult to wake.
- A stiff neck, dislike of bright light, or a convulsion.
- Not passing urine, or a dry nappy for many hours.
Never give aspirin to anyone under 16 unless a doctor has specifically prescribed it, because of the risk of Reye's syndrome. And do not alternate paracetamol and ibuprofen routinely without advice.
Fever is part of the immune response rather than the illness itself. What matters clinically is how the child looks and behaves, not the reading on the thermometer, which is why the warning list is about behaviour rather than numbers.
This is general information, not medical advice, and it does not replace a GP, a pharmacist or NHS 111. Call 999 in an emergency. Full disclaimer.