Fever Decision Guide for Parents
What temperature counts as a fever, when it's too high, when to head to the ER, and how to bring it down at home. Quick, practical guidance cross-checked against CDC, AAP, and Mayo Clinic recommendations.
Fever symptoms in kids: what to look for
A fever is a body temperature of 100.4°F (38°C) or higher. It rarely travels alone. These are the symptoms that usually come with it, and what they mean:
Warm or hot forehead, flushed skin
Often the first sign parents notice
Chills or shivering
The body raising its temperature on purpose
Sweating
Usually as the fever breaks
Headache and body aches
Common with flu and other viral infections
Loss of appetite
Normal during a fever; fluids matter more than food
Extra sleepy or fussy
Rest is part of healing; watch for extreme lethargy instead
Dehydration
Fewer wet diapers, dry mouth, or no tears when crying need attention
When a fever is too high: quick reference by age
100.4°F (38°C) or higher
Call your pediatrician or go to the ER immediately
102°F (38.9°C) or higher
Call your pediatrician the same day
102°F (38.9°C) or higher
Give medication and monitor; call if it lasts 24+ hours
104°F (40°C) or higher
Give medication; call doctor if it won't come down or lasts 3+ days
Go to the ER if your child has a fever with any of these
- •Trouble breathing or fast breathing
- •Stiff neck with severe headache
- •Rash that doesn't fade when you press on it
- •Extreme lethargy, confusion, or can't be woken
- •Repeated vomiting or can't keep fluids down
- •Seizure or convulsion
- •Fever above 104°F that won't come down with medication
- •Sunken eyes, no tears when crying, or dry mouth (dehydration)
When in doubt, call your pediatrician. You know your child best.
Bringing a fever down at home
Fever is the body's way of fighting infection. You don't always need to bring it down, but if your child is uncomfortable, here's what helps:
- Give acetaminophen (Tylenol) or ibuprofen (Motrin/Advil) for kids over 6 months, dosed by weight
- Dress in light clothing, keep the room comfortably cool
- Offer fluids frequently: water, Pedialyte, broth, or popsicles
- A lukewarm sponge bath can help; never use cold water, ice, or rubbing alcohol
- Check temperature every 4 hours and track symptoms
- Let your child rest; sleep is part of healing
The fever kit worth having before 2am
None of this shortens an illness, but having it in the cupboard means one less trip out with a miserable kid. These are the fever essentials parents keep on hand:
Fever essentials
These are everyday supplies parents tell us they like to have on hand, not medical advice. Nothing here diagnoses or treats anything. Always follow your pediatrician's guidance, and check labels for your child's age and weight.
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- ThermometerA reading you trust settles most of the should-we-call-the-doctor debate. One is enough, so pick the style that suits your child's age.
- Kids' fever and pain relieverHave both acetaminophen and ibuprofen options on hand and dose by weight.
- Oral medicine syringe setFar easier than a spoon for an unhappy toddler, and far more accurate.
- Oral rehydration drinks or freezer popsSmall sips keep fluids up when a child refuses to drink.
Pedialyte Electrolyte Powder Packets (Variety Pack)On-the-go powder packets in grape, fruit punch, strawberry, and orange. Mix with water for fast rehydration from the #1 doctor-recommended brand.
Pedialyte Electrolyte Solution Freezer Pops (64ct)Frozen pops with three key electrolytes and four fruit flavors. Great for toddlers who refuse a cup; small sips add up fast.
How long should a fever last?
Most viral fevers (colds, flu, RSV) last 3 to 4 days and rarely go beyond 5.
Flu fevers commonly last 3 to 5 days, with the highest temps in the first 48 hours.
Strep throat fevers usually improve within 24 hours of starting antibiotics.
Call your doctor if: a fever lasts more than 3 days, goes above 104°F and won't come down with medication, or goes away and then comes back.
Flu symptom guide
How to tell the flu from a cold and when to call your doctor.
All illness guides
Strep, RSV, croup, stomach bugs, and more.
Flu season readiness hub
Checklist to prepare your family for sick season.
See what's going around
Follow your school and get local illness alerts from other parents.
Frequently asked questions
- When is a fever too high for a child?
- For babies under 3 months, any fever of 100.4°F (38°C) or higher is an emergency, go to the ER or call your pediatrician right away. For kids 3 months and older, a fever of 104°F (40°C) or higher that doesn't come down with medication, or lasts more than 3 days, warrants a call to the doctor. Fevers above 105°F (40.5°C) need immediate medical attention at any age.
- When should I take my child to the ER for a fever?
- Go to the ER if your child has a fever along with: trouble breathing, a stiff neck with severe headache, a rash that doesn't fade when pressed, extreme lethargy or confusion, repeated vomiting, a seizure, or a fever above 104°F that won't come down after medication. Babies under 3 months with any fever should be seen immediately.
- What temperature is considered a fever for a child?
- A fever is a body temperature of 100.4°F (38°C) or higher, measured rectally in babies and under the tongue or on the forehead in older kids. Temperatures between 99°F and 100.3°F are usually normal variations, not fevers.
- How long should a fever last in a child?
- Most viral fevers last 3 to 4 days. A fever that lasts more than 5 days, or improves and then returns, should be evaluated by a doctor. Fevers from the flu commonly last 3 to 5 days, while strep throat fevers improve within 24 hours of starting antibiotics.
- How many days of fever before I should call the doctor?
- Call your pediatrician if a fever lasts more than 3 days, if it's above 104°F and not responding to medication, or if your child looks unusually ill regardless of the number on the thermometer. For babies under 3 months, call immediately for any fever.
- How do I reduce a fever in my child naturally at home?
- Dress your child in light clothing, keep the room comfortably cool, offer plenty of fluids (water, Pedialyte, broth), and encourage rest. A lukewarm sponge bath can help, but never use cold water or rubbing alcohol. Acetaminophen (Tylenol) or ibuprofen (Motrin, Advil) for kids over 6 months can bring the fever down, always dose by weight, not age.
- Is 101°F a high fever for a child?
- No. For children 3 months and older, 101°F is a moderate fever and usually not dangerous on its own. It's the body fighting an infection. Focus on comfort and hydration, give fever-reducing medication if your child is uncomfortable, and watch for warning signs like lethargy or trouble breathing.
- Should my child go to school with a fever?
- No. Keep your child home until they've been fever-free for at least 24 hours without fever-reducing medication. Sending a child to school with a fever spreads illness and slows their recovery.
Get a heads-up before fever hits your house
Knowing what's actually spreading in your kid's school this week gives you a head start. Follow your school on Ickly to get local alerts as parents log symptoms.