7 Fever Myths Even Experienced Parents Believe
After years in the pediatric ER, I can predict the questions before parents ask them — because fever myths are passed down with total confidence from generation to generation. Let's retire seven of them for good.
Myth 1: Teething causes high fever
Teething can cause fussiness, drooling, and maybe a slightly elevated temperature — but true fever (100.4°F+) is not caused by teething. If your teething baby has a real fever, look for another cause (and remember the under-3-month rule).
Myth 2: The higher the fever, the sicker the child
The number on the thermometer does not measure seriousness. I have seen playful toddlers with 104°F from a routine virus, and critically ill children with barely 101°F. Behavior beats the number — alertness, drinking, breathing, and consolability tell the real story.
Myth 3: Fever causes brain damage
Ordinary fevers from infection do not cause brain damage. Brain injury from heat requires body temperatures above ~107–108°F, which essentially never happens from infection (that's heatstroke territory, a different condition entirely).
Myth 4: You must get the fever all the way down to normal
The goal is comfort, not a perfect 98.6. A child who is playing and drinking with a temperature of 101°F does not need medicine to “fix” the number.
Myth 5: “Feed a cold, starve a fever”
Please feed the fever. Sick children need fluids and nutrition. Offer food as appetite allows — no one ever recovered faster by skipping meals.
Myth 6: Bundling up “sweats out” a fever
Bundling traps heat and makes things worse. Dress feverish children lightly. (And skip the cold baths and alcohol rubs too — shivering raises temperature, and alcohol can be absorbed through skin.)
Myth 7: If the fever breaks, we're in the clear
Usually true — but watch for fever that resolves for 24+ hours and then returns, which can signal a secondary infection like an ear infection. That pattern deserves a call to the pediatrician.
The through-line of every myth: fever is a symptom, not the enemy. It is the immune system working. Your job is comfort, fluids, and watching for the warning signs in our complete fever guide.
Frequently asked questions
Does teething cause fever in babies?
No — teething does not cause true fever (100.4°F/38°C or higher). Mild fussiness or a slightly raised temperature can occur, but real fever needs another explanation.
Can a high fever cause brain damage?
No. Fevers from infection do not cause brain damage. Only extreme body temperatures above about 107–108°F (heatstroke range) can injure the brain.
Should I bundle my child to sweat out a fever?
No — bundling traps heat. Dress feverish children in one light layer and offer plenty of fluids.
Reviewed by Ali Ozcan, MD, MBA
Board-certified pediatric emergency medicine physician and creator of ER4Kids. This guide reflects the same trusted, evidence-based guidance Dr. Ozcan provides to families in the emergency department.
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