If your child has a fever, the most important thing to do first is check their age and temperature. A fever is 100.4°F (38°C) or higher when taken rectally, 100°F (37.8°C) orally, or 99°F (37.2°C) under the arm. For babies under 3 months old, any fever of 100.4°F or higher is a medical emergency. For older children, most fevers can be safely managed at home.
Check Your Child’s Age First
Age changes everything when it comes to pediatric fever. A newborn’s immune system is immature, so even a low-grade fever can signal a dangerous infection that needs immediate evaluation.
If your baby is younger than 2 months with a rectal temperature above 100.4°F, go to an emergency department immediately. Don’t give fever-reducing medication first and don’t wait to see if the fever resolves on its own. If your baby is between 2 and 3 months old, call their doctor right away. For children older than 3 months, you generally have time to observe, keep them comfortable, and treat at home unless warning signs appear.
Why Fever Isn’t Always the Enemy
Fever is your child’s immune system doing its job. The rise of 1 to 4°C in core body temperature that happens during fever improves the body’s ability to fight off infections. At febrile temperatures (around 104°F), the replication rate of certain viruses drops by more than 200-fold, and bacteria become more vulnerable to the body’s natural defenses. Mounting evidence links fever with improved survival and faster resolution of infections.
This means you don’t need to bring a fever down to normal at all costs. The goal of treatment is comfort, not hitting a specific number on the thermometer. If your child is drinking fluids, playing occasionally, and generally acting like themselves between bouts of feeling crummy, a moderate fever on its own isn’t dangerous.
How to Keep Your Child Comfortable
Start with the basics: dress your child in light clothing and keep the room at a comfortable temperature. Heavy blankets and bundling can trap heat and push a fever higher. Offer fluids frequently. Water, diluted juice, ice pops, and breast milk or formula for infants all help prevent dehydration, which is one of the real risks of a prolonged fever.
Lukewarm sponge baths can bring a temperature down quickly. Research shows sponging reduces fever to normal range within 30 minutes in about 70% of children. However, the effect is temporary. Temperatures often climb back up within an hour or two. Sponging also causes more discomfort than medication alone. About a quarter of sponged children shiver, and roughly a third cry during the process. If you use a sponge bath, treat it as a bridge to help your child feel better quickly while waiting for medication to kick in, not as a standalone treatment. Never use cold water, rubbing alcohol, or ice baths.
Fever-Reducing Medication
Acetaminophen (Tylenol) is safe for children 2 months and older. Ibuprofen (Advil, Motrin) can be used for children 6 months and older. Both are dosed by weight, not age, so check the packaging carefully or ask your pharmacist if you’re unsure. Ibuprofen can be given every 6 to 8 hours as needed.
Never give aspirin to children or teenagers. Aspirin has been linked to Reye’s syndrome, a rare but serious condition that causes swelling in the liver and brain. It can lead to seizures, loss of consciousness, and death within days if untreated. This risk is highest when aspirin is given during viral illnesses like the flu or chickenpox.
Alternating Medications
You may have heard about alternating acetaminophen and ibuprofen to keep a fever down more consistently. The American Academy of Pediatrics advises against doing this routinely. Alternating creates confusion about which drug was given when, increasing the risk of accidental overdose. There’s also a theoretical risk of liver and kidney stress from combining the two. If a single medication isn’t controlling your child’s discomfort, talk to your pediatrician before adding a second one. A short alternating course may be reasonable in some cases, but it shouldn’t be the default approach.
Febrile Seizures
Fevers can sometimes trigger seizures in young children, most commonly between ages 6 months and 5 years, with the highest risk between 1 and 3 years old. These are called simple febrile seizures. They involve shaking or stiffening of the body and typically last a few seconds to 15 minutes, occurring only once in a 24-hour period.
Watching your child have a seizure is terrifying, but simple febrile seizures do not cause brain damage or long-term health problems. If one happens, lay your child on their side on a flat surface, don’t put anything in their mouth, and time the seizure. Call your doctor afterward. If the seizure lasts longer than 5 minutes, call 911.
Warning Signs That Need Immediate Attention
Most childhood fevers resolve in a few days without complications. But certain symptoms alongside a fever signal something more serious:
- Extreme sleepiness or unresponsiveness: your child is hard to wake up or doesn’t react to your voice or touch
- Difficulty breathing: fast, labored, or shallow breaths, chest pulling inward with each breath, or blue-tinged lips or face (call 911)
- Signs of dehydration: dry mouth or cracked lips, fewer than six wet diapers in 24 hours, no tears when crying, or a sunken soft spot on a baby’s head
- A rash that doesn’t fade when pressed or purple spots on the skin, which could indicate a serious bacterial infection like meningitis
- Stiff neck: your child resists moving their neck or can’t bend it forward
- Persistent, unusual crying: high-pitched crying that can’t be soothed
- Bulging soft spot on a baby’s head, which may indicate increased pressure inside the skull
Any of these signs alongside a fever warrant immediate medical care. Trust your instincts as a parent. If something feels off about the way your child looks or acts, even without these specific red flags, it’s reasonable to call your pediatrician or head to urgent care.