Pediatric Care · Cedar Park, TX

Fever in Children: When Should Parents Worry?

A pediatrician's guide to understanding childhood fevers — when to treat at home and when to call the doctor.

By , board-certified in Pediatrics and Sleep Medicine · Updated

General information, not medical advice. Read our disclaimer.

4 min read
Cedar Park, TX Mon–Fri 8:30 AM – 5:00 PM Accepting New Patients

Why Parents Worry About Fever

Few things make a parent's heart race like touching their child's forehead and feeling it burning hot. Fever is one of the most common reasons parents call the pediatrician or rush to urgent care — and understandably so. But here's the reassuring truth: fever itself is not dangerous in most cases. It's actually a sign that your child's immune system is doing its job.

Fevers are one of the most common reasons parents call the pediatrician. Here is what's happening, what you can do at home, and when a fever truly needs medical attention.

What Is a Fever?

A fever is a temporary rise in body temperature, usually in response to an infection. A normal body temperature is around 98.6°F (37°C), though it can vary slightly throughout the day.

A fever is defined as a temperature of 100.4°F (38°C) or higher. The fever itself is not an illness — it's a symptom that tells us the body is fighting something, usually a virus.

Common Causes of Fever in Children

  • Viral infections — The most common cause. Colds, flu, and stomach bugs all cause fevers.
  • Ear infections — Very common in toddlers and young children.
  • Urinary tract infections — Can cause fever, especially in infants.
  • Strep throat — Bacterial infection that needs antibiotic treatment.
  • Vaccinations — A low-grade fever is a normal response after immunizations.
  • Roseola — Common in babies, causes high fever followed by a rash.

Symptoms Parents Should Watch For

The number on the thermometer matters less than how your child looks and acts. Pay attention to:

  • Is your child still drinking fluids?
  • Are they making wet diapers or urinating regularly?
  • Are they alert and responsive, even if fussy?
  • Can they be comforted?
  • Is the fever responding to medication?

A child with a 103°F fever who is playing and drinking well is generally in better shape than a child with a 101°F fever who is limp and unresponsive.

What Parents Can Do at Home

  • Keep your child hydrated. Offer small, frequent sips of water, breast milk, formula, or an electrolyte solution like Pedialyte.
  • Dress them lightly. Avoid bundling up a feverish child. Light clothing helps heat escape.
  • Use fever-reducing medication if your child is uncomfortable. Acetaminophen (Tylenol) can be given at any age; ibuprofen (Advil/Motrin) is safe for children 6 months and older. Always dose by weight, not age.
  • Offer a lukewarm bath. A lukewarm (not cold) bath can help bring down body temperature. Never use rubbing alcohol or ice baths.
  • Let them rest. Sleep is when the body heals best.

When to Call the Pediatrician

Call your pediatrician if:

  • Your baby is under 3 months old with any fever of 100.4°F or higher
  • Your child is 3-6 months old with a fever over 102°F
  • The fever lasts more than 3 days
  • Your child has a chronic medical condition
  • The fever keeps returning after going away
  • Your child is not drinking fluids or making wet diapers

When to Go to Urgent Care or the Emergency Room

Seek immediate care if your child has a fever with:

  • A stiff neck or severe headache
  • Difficulty breathing or rapid breathing
  • A rash that doesn't fade when you press on it (petechiae)
  • Seizures (febrile seizures)
  • Extreme lethargy — difficult to wake up or unresponsive
  • Signs of dehydration — no tears, dry mouth, no wet diapers for 6+ hours
  • A fever over 104°F (40°C) that doesn't respond to medication

Prevention Tips

  • Frequent handwashing — The single best way to prevent infections.
  • Stay up to date on vaccinations — Vaccines prevent many serious illnesses that cause fevers.
  • Teach kids not to share cups and utensils
  • Keep sick children home from school or daycare to prevent spreading illness.

Myth vs. Fact

Myth: High fevers cause brain damage.
Fact: Fevers from infection do not cause brain damage. The body has a natural thermostat that prevents fever from rising to dangerous levels. Only external heat sources (like being left in a hot car) can cause dangerously high temperatures.
Myth: You should always bring a fever down to normal.
Fact: Treating a fever is about comfort, not reaching a specific number. If your child is playing and comfortable with a 101°F fever, medication isn't always necessary.

Key Takeaways

  • Fever is usually a sign that the immune system is working, not a cause for panic
  • How your child acts matters more than the number on the thermometer
  • Babies under 3 months with any fever need immediate medical evaluation
  • Keep your child hydrated and comfortable — that's the most important thing
  • When in doubt, call your pediatrician. We're here to help!

Ready to Schedule Your Visit?

Teddy Bear Pediatrics in Cedar Park, TX is accepting new patients. Call us today or register online.

Frequently Asked Questions

Common questions about pediatric care answered by Dr. Patel.

What temperature is considered a fever in children?

A temperature of 100.4°F (38°C) or higher is considered a fever. For babies under 3 months, any fever at this level needs immediate medical attention.

Should I let a fever run its course?

In many cases, yes. Fever is the body's natural defense against infection. You don't always need to treat a low-grade fever unless your child is uncomfortable. Focus on comfort rather than the exact number.

Can teething cause a fever?

Teething may cause a very slight rise in temperature, but it should not cause a true fever over 100.4°F. If your teething baby has a higher fever, another illness is likely the cause.

When should I take my child to the ER for a fever?

Go to the ER if your child has a fever with a stiff neck, severe headache, difficulty breathing, a rash that doesn't fade with pressure, seizures, or if they are extremely lethargic and hard to wake up.

Is it safe to alternate Tylenol and ibuprofen?

Your pediatrician may recommend alternating acetaminophen (Tylenol) and ibuprofen (Advil/Motrin) every 3-4 hours for persistent high fevers. However, always consult your doctor before doing this to avoid dosing errors.

How do I take my child's temperature accurately?

For babies under 3 months, a rectal thermometer is most accurate. For older children, an oral or temporal (forehead) thermometer works well. Ear thermometers are convenient but can be less accurate in young infants.

Trusted Medical Sources

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