Fever

Fever is an elevated body temperature, usually defined as 38°C or higher. It often occurs as part of the body's response to infection, but the cause and severity vary. A temperature reading should be considered alongside age, alertness, breathing, hydration and other symptoms rather than used as the only measure of illness.

Does a higher number always mean a worse illness?

No. A person can be seriously unwell without a very high temperature, and some uncomplicated infections cause a substantial fever. Tell the clinician how the temperature was measured and what other changes you have noticed.

Age and health history matter. Fever in a baby younger than three months needs urgent medical assessment. People with significant immune suppression should follow their clinical team's fever instructions and seek advice promptly. Do not wait for a routine consultation if you have been told fever requires immediate review.

For the Australian guidance behind this explanation, see Healthdirect Australia: Fever - normal and high temperature range, when to see GP | healthdirect.

What can I do while monitoring symptoms?

Rest, keep comfortably dressed and take suitable fluids if able. Avoid extreme cooling methods that provoke shivering. Ask a pharmacist or doctor about symptom relief appropriate to age and health, and follow the directions provided. The aim is to assess and manage the illness, not simply chase a normal number.

Record the onset, associated symptoms, recent travel and contact with infections. Mention urinary symptoms, cough, rash or localised pain. Ask when reassessment is needed if the fever persists or returns after improving. Telehealth may help with stable symptoms but cannot replace all examinations or tests.

When should I call 000?

Call 000 for severe breathing difficulty, collapse, reduced consciousness, a seizure or other life-threatening symptoms. Fever with confusion, a stiff neck, a concerning rash or severe pain needs urgent care. A person who looks seriously unwell needs assessment even if the thermometer is not showing a high reading.

Where to go next

Read online doctor consultations to understand the relevant service. A doctor decides whether a consultation, examination, referral or another pathway is appropriate for your situation.