Few things make parents reach for the thermometer faster than touching their child’s forehead and discovering they feel unusually hot.
Fever is extremely common in childhood and is usually the body’s natural response to an infection. In many cases, the illness causing the fever is minor and improves without specific medical treatment.
However, age matters, accompanying symptoms matter, and how your child looks and behaves matters.
Understanding what counts as a fever, how to care for a child comfortably at home, and which warning signs require medical attention can make fever much less frightening.
What Is Considered a Fever in Children?
A temperature of 38°C or higher is generally considered a fever in babies and children.
Normal body temperature can vary slightly between children and can change with activity and time of day.
Children with a fever may:
▪ Feel hot to the touch
▪ Sweat or shiver
▪ Look flushed
▪ Become tired or irritable
▪ Eat less than usual
▪ Want to sleep more
Some children remain surprisingly active despite having a fever.
Why Do Children Get Fevers?
Fever is usually a response to infection.
Viruses responsible for illnesses such as colds and flu are common causes. Bacterial infections, including some ear, throat, chest, or urinary infections, can also cause fever.
Children can also develop a temperature following some vaccinations.
A fever is a symptom rather than an illness itself.
The important question is therefore not simply, “How do I lower the temperature?” but also, “How is my child behaving, and are there other concerning symptoms?”
Measuring Your Child’s Temperature
Use a reliable digital thermometer and follow its instructions carefully.
Simply touching your child’s forehead can tell you they feel warm, but it does not provide an accurate temperature measurement.
The appropriate method of measuring temperature can depend on the child’s age and the thermometer being used.
The American Academy of Pediatrics recommends digital thermometers and advises against old-style mercury thermometers because broken mercury thermometers can create a toxic exposure risk.
If you are uncertain about which method is appropriate for your child’s age, ask a healthcare professional or pharmacist.
Your Child’s Behaviour Matters
Parents naturally focus on the temperature displayed on the thermometer.
But the number does not tell the whole story.
A child with a fever who is drinking, communicating, and occasionally playing can be less concerning than a child with a lower temperature who is extremely sleepy, struggling to breathe, confused, or not responding normally.
The American Academy of Pediatrics advises parents to pay close attention to the child’s overall condition and behaviour rather than concentrating only on the temperature.
Continue monitoring because symptoms can change as an illness develops.
Fever in Babies Under Three Months
Fever requires particular caution in very young babies.
A baby younger than three months with a temperature of 38°C or higher should receive prompt medical assessment, even if the baby otherwise appears well.
Young infants can become seriously unwell more quickly and may not display the same obvious symptoms as older children.
Do not simply give fever medicine and wait for the temperature to disappear without seeking appropriate medical advice.
What About Babies Three to Six Months Old?
Younger babies still require closer attention than older children.
Guidelines can vary slightly between healthcare systems. For example, current NHS guidance advises urgent medical advice for a baby aged three to six months with a temperature of 39°C or higher, or whenever there are other concerning symptoms.
Because recommendations may differ by country, parents should follow local medical guidance and contact a healthcare professional whenever they are concerned about a young baby.
Caring for a Child With Fever at Home
Many fevers in older babies and children can be managed at home when the child otherwise appears reasonably well and has no warning signs.
The priority is comfort and hydration.
Encourage your child to drink regularly. If your baby is breastfeeding, continue breastfeeding normally.
Offer food if your child wants it, but do not force eating when appetite is temporarily reduced.
Check your child regularly, including during the night when appropriate.
Most importantly, watch for changes in behaviour, breathing, hydration, and other symptoms.
Keep Your Child Comfortable
Children with fever do not need to be bundled in heavy blankets to “sweat the fever out.”
Dress them comfortably and avoid excessive clothing or bedding.
At the same time, there is no need to strip a child down aggressively or make them uncomfortably cold.
Cold baths and ice baths are not recommended approaches to fever management because they can cause shivering and discomfort.
Focus on keeping the child comfortable rather than forcing the thermometer reading back to normal.
Should You Give Medicine for a Fever?
Fever-reducing medicine may be appropriate when a child is uncomfortable or distressed rather than simply because the thermometer shows a particular number.
Paracetamol/acetaminophen or ibuprofen may be appropriate for some children, but suitability depends on age, weight, health, and other factors.
Always follow the product instructions or advice from a healthcare professional or pharmacist.
Do not give aspirin to children under 16 unless specifically prescribed by a doctor. Current NHS guidance also advises against routinely alternating paracetamol and ibuprofen unless instructed by a healthcare professional.
If you are unsure about the correct medicine or dose, ask a pharmacist or doctor rather than guessing.
Keep an Eye on Hydration
Children can lose more fluid when they have a fever.
Offer appropriate fluids regularly.
Watch for signs of dehydration such as:
▪ Urinating less frequently
▪ Fewer wet nappies
▪ Dark urine
▪ Dry mouth
▪ Few or no tears
▪ Unusual tiredness
A child who cannot drink or keep fluids down may require medical attention.
Severe dehydration can be dangerous, particularly in babies and young children.
How Long Does a Fever Usually Last?
Many childhood fevers associated with viral illnesses improve within a few days. NHS guidance notes that children’s temperatures commonly return to normal within approximately one to four days.
The duration alone does not determine how serious an illness is.
Seek medical advice sooner if your child develops concerning symptoms, becomes increasingly unwell, or has risk factors requiring closer monitoring.
A fever that persists or repeatedly returns also deserves medical advice.
Fever and Febrile Seizures
Some young children can experience a seizure associated with fever, known as a febrile seizure.
The child may become stiff, shake, lose consciousness, or stop responding temporarily.
Watching this happen can be extremely frightening.
If your child experiences their first seizure, seek emergency medical assistance. Do not place anything in their mouth.
Once the immediate episode has passed, the child should receive appropriate medical assessment.
When Does a Fever Need Urgent Medical Attention?
Seek urgent medical care if a child with fever:
▪ Has difficulty breathing or is breathing very fast
▪ Is difficult to wake or unusually drowsy
▪ Is confused or not responding normally
▪ Has a stiff neck
▪ Develops a purple or non-fading rash
▪ Has a seizure
▪ Cannot keep fluids down
▪ Shows significant signs of dehydration
▪ Appears seriously ill or is rapidly deteriorating
A baby younger than three months with a temperature of 38°C or higher also requires prompt assessment.
Do not wait for the fever to become higher if other serious symptoms are already present.
When Should You Contact Your Child’s Doctor?
Even without emergency symptoms, contact your child’s healthcare professional if the fever is lasting longer than expected, repeatedly returning, or accompanied by symptoms such as significant ear pain, severe sore throat, persistent vomiting or diarrhoea, worsening cough, pain when urinating, or an unexplained rash.
Children with weakened immune systems or significant underlying health conditions may need medical advice sooner.
If you are simply worried because your child is behaving very differently from normal, that is also a reasonable reason to seek advice.
Fever Is Not Always the Enemy
It is understandable that parents want to bring a high temperature down immediately.
But fever itself is usually part of the body’s response to infection.
The aim of home care is generally to keep children comfortable, hydrated, and carefully observed while their illness improves—not to chase a perfectly normal temperature throughout the day.
Your child’s overall condition matters more than one isolated thermometer reading.
Frequently Asked Questions
What temperature is considered a fever in children?
A temperature of 38°C or higher is generally considered a fever in babies and children.
Should I wake my child during the night to check their fever?
A sick child should be checked regularly, including during the night when appropriate. What matters is making sure they are breathing comfortably, can be roused appropriately, and are not developing concerning symptoms.
Should I give medicine every time my child has a fever?
Not necessarily. Fever medicines are commonly used when children are distressed or uncomfortable. Always use age- and weight-appropriate medication and dosing and seek professional advice if unsure.
When is fever an emergency in a baby?
A baby under three months with a temperature of 38°C or higher requires prompt medical assessment, even if there are no other obvious symptoms.
When should I worry about a fever in an older child?
Seek urgent care if fever occurs with breathing difficulty, severe drowsiness, confusion, a stiff neck, seizure, significant dehydration, a concerning non-fading rash, or if your child appears seriously unwell.
