Fever in Children — When to Worry
What fever actually means
A fever is a rise in body temperature as part of the immune system’s response to infection. In children, fever most often reflects a viral illness and is a sign that the body is reacting appropriately. Fever itself is not an illness and does not automatically mean something serious is wrong.
Why the number matters less than the child
Parents often focus on the temperature reading, but how your child looks and behaves usually matters more than the number. A child with a high temperature who is alert, drinking fluids, and responsive may be less concerning than a child with a lower temperature who is unusually drowsy, difficult to rouse, or not interacting normally.
Why fever feels different in different children
Children respond to infection in individual ways. Age, immune maturity, prior exposure to infections, and overall health all influence how fever presents. Infants and very young children can appear unwell quickly because their bodies have less reserve, while older children may tolerate fever with fewer outward signs.
Common causes of fever
Most fevers in children are caused by viral infections such as respiratory or gastrointestinal illnesses. Less commonly, bacterial infections may be involved. Fever can also follow vaccinations as part of a normal immune response. In many cases, the exact cause is not immediately clear, and observation over time provides valuable information.
When fever deserves closer attention
A fever warrants medical review when it is persistent, worsening, or accompanied by concerning features. These include difficulty breathing, poor fluid intake, signs of dehydration, ongoing vomiting, severe headache, stiff neck, unusual rash, confusion, persistent pain, or a child who is not behaving in their usual way. Fever in babies under three months always requires prompt medical assessment.
What treatment aims to do
Treating fever focuses on comfort rather than eliminating temperature alone. Fluids, rest, and appropriate use of fever-reducing medication can help children feel better. Lowering a fever does not treat the underlying illness, but it may improve comfort, sleep, and hydration.
How your GP helps guide decisions
Your GP assesses fever in the context of your child’s age, symptoms, medical history, vaccination status, and how the illness is evolving. Often the most helpful decision is reassurance and monitoring, while in other situations early investigation or referral is important. Clear guidance helps families feel confident about what to watch for at home and when to seek further care.
Fever is common in childhood. Understanding when it is part of a normal immune response — and when it signals the need for review — supports calm, timely decisions.
This article provides general health information only and does not replace medical advice. Please speak with your GP for personalised care.