Fever
Fever in children: when should you see a doctor?
Short clinical summary
Fever is not a disease but a sign of the body's response to infection. A temperature of 38 °C or above is generally accepted as fever. What matters in assessment is not the height of the fever but the child's age, general condition, fluid intake and accompanying findings. In infants under 3 months, fever always requires urgent assessment.
What is fever and why does it rise?
Fever is a rise in body temperature as part of the immune response. The most common cause in childhood is viral infection. Fever itself is not a harmful mechanism; it is an expected reaction of a body fighting infection.
The aim of treatment is therefore not necessarily to bring the temperature down to "normal", but to help the child feel better.
How is it measured?
The measurement method affects the result, so it is important to tell your physician how the temperature was taken. In small infants the most reliable method is the one your physician recommends; contactless forehead measurements are practical but can give more variable results.
Points to watch when measuring
- Repeat the measurement if the child is heavily dressed or crying.
- Do not measure immediately after a hot bath or a hot drink.
- Noting measurement times and values helps with medical assessment.
How should fever be managed at home?
- Increase fluid intake; small, frequent amounts are better tolerated.
- Dress the child lightly; avoid heavy covers and wrapping in blankets.
- Keep the room temperature comfortable.
- Follow your physician's advice for antipyretic use and dosing; the dose is based on the child's weight.
- Monitor alertness, fluid intake and urine output.
What not to do
- Sponging with alcohol, vinegar or cold water — ineffective and potentially harmful.
- Alternating between multiple antipyretics without medical advice.
- Using adult medication or medication prescribed for another child.
- Giving aspirin to a child with a suspected viral infection.
- Starting antibiotics without a prescription.
When should you see a doctor?
Situations requiring urgent assessment
- Fever of 38 °C or above in an infant under 3 months (always)
- A purple-red rash that does not fade under pressure
- Marked lethargy, difficulty waking, or inconsolable distress
- Rapid or laboured breathing, retractions, bluish discolouration
- Neck stiffness, severe headache, discomfort in bright light
- A first-ever seizure, or a prolonged seizure
- Inability to take fluids, markedly reduced urine output, dry mouth
- Fever lasting more than 5 days, or returning after settling
- Fever in a child with a chronic condition or a suppressed immune system
Febrile seizures
A seizure occurring with fever is one of the most frightening situations for families of young children. Simple febrile seizures are brief and usually leave no lasting problems; however, any first seizure requires medical assessment.
During a seizure the child should be placed on their side, nothing should be put in their mouth, and the duration should be timed. If the seizure is prolonged, emergency help should be called.
Frequently asked questions
What temperature counts as fever?
A body temperature of 38 °C or above is generally accepted as fever. Because the measurement method can affect the result, how the temperature was taken also matters.
Does a higher fever mean a more serious illness?
No. The height of the fever alone does not indicate severity. The child's general condition, fluid intake, alertness, breathing and accompanying findings are far more informative.
My baby has a fever — should we go to hospital immediately?
In infants under 3 months, a fever of 38 °C or above always requires urgent medical assessment. In older children the decision depends on general condition, duration and accompanying findings.
What if the fever does not come down?
Temperature not returning entirely to normal after an antipyretic is not in itself a cause for concern; what matters is that the child is more comfortable and generally well. If the child is lethargic, unable to drink, or shows any of the warning signs above, medical assessment is needed.
References
- National and international pediatric guidelines on fever management in children.
- Clinical guidance on risk assessment in the febrile child.
- Consensus reports on the approach to febrile seizures.
- Official information resources on the rational use of medicines.
This content is provided for general information purposes and does not replace individual medical assessment, diagnosis or treatment. Medication and dosing are determined by your physician.
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Author and medical reviewer
Ayça Sözen, MD
Specialist in pediatrics. Currently seeing patients at Acıbadem Ataşehir Hospital.