Fevers in children can be a source of anxiety for parents. While a fever is often the body’s way of fighting infection, it’s natural to wonder when a fever requires medical attention. This guide will help you understand the causes, symptoms, and treatment options for fevers in children and when it’s time to seek professional advice.

What Is a Fever?
A fever occurs when the body’s temperature rises above its normal range, typically 98.6°F (37°C). In children, a fever is generally considered to be:
- 100.4°F (38°C) or higher
Fevers are a symptom, not an illness. They are a natural response to infection or other conditions.
Common Causes of Fevers in Children
- Viral Infections
- Colds, the flu, or other common viruses often cause mild to moderate fevers.
- Bacterial Infections
- Ear infections, strep throat, or urinary tract infections can lead to higher fevers.
- Teething
- Teething may cause a slight increase in temperature but not usually a true fever.
- Vaccination
- Mild fevers can occur after routine immunizations.
Symptoms to Watch Alongside a Fever
While a fever itself is not always dangerous, other symptoms may indicate a more serious condition. Watch for:
- Lethargy or extreme irritability.
- Difficulty breathing or rapid breathing.
- Refusal to drink fluids or signs of dehydration.
- Rashes that don’t fade when pressed.
- Persistent vomiting or diarrhea.
When to Worry: Signs to Seek Medical Attention
- For infants under 3 months: Any fever of 100.4°F (38°C) or higher should be evaluated immediately.
- For children aged 3-6 months: A fever above 102°F (38.9°C) or a lower fever with concerning symptoms warrants a call to the doctor.
- For children over 6 months: Seek help if the fever exceeds 104°F (40°C), lasts more than three days, or is accompanied by severe symptoms like seizures or confusion.
How to Treat a Fever at Home
- Hydration
- Encourage water, breast milk, or electrolyte solutions to prevent dehydration.
- Comfort Measures
- Dress your child in lightweight clothing and keep the room at a comfortable temperature.
- Medications
- Use acetaminophen or ibuprofen for children over 6 months (consult dosing with your provider). Avoid aspirin due to the risk of Reye’s syndrome.
- Rest
- Allow your child to rest and avoid overexertion.
Debunking Fever Myths
- Myth: Fevers always need treatment.
- Fact: A fever is the body’s way of fighting infection and doesn’t always require medication.
- Myth: A high fever causes brain damage.
- Fact: Fevers alone, even those over 104°F (40°C), rarely cause harm.
Preventing Fevers
While not all fevers can be prevented, these steps can help reduce your child’s risk of infection:
- Practice good hand hygiene.
- Keep up-to-date with vaccinations.
- Maintain a healthy diet and encourage regular exercise to boost the immune system.
How Pediatric Telehealth Can Help
Fevers can be stressful, but you don’t have to face them alone. At Pediatric Telehealth of Colorado, our pediatric providers are here to help you determine the best course of action.
- Virtual Appointments
- Our providers can evaluate your child’s symptoms and recommend appropriate care.
- Pediatric Hotline
- Not sure if a fever needs urgent attention? Our pediatric nurse hotline offers guidance and reassurance when you need it most.
Your child’s health and your peace of mind are our top priorities. Reach out to us today for expert support in caring for your child, no matter where you are.
Written by:
Pediatric Telehealth of Colorado Editorial Team
Medically Reviewed by:
Brooke Douglas, CPNP