Shivering during a fever is your child’s body actively generating heat to raise its internal temperature. It looks alarming, but it’s a normal part of how fevers work. The most helpful things you can do right now are offer a light blanket, give a fever-reducing medicine if your child is uncomfortable, and push small sips of fluid. Below is a fuller picture of what’s happening and how to respond step by step.
Why Fevers Cause Shivering
When your child picks up an infection, the brain resets its internal thermostat to a higher target temperature. Until the body actually reaches that new target, your child feels cold, even though their skin may already feel warm to you. Shivering is the muscles contracting rapidly to produce heat and close the gap. It’s the same mechanism that makes you shiver on a cold day, just triggered by a different signal.
Once the fever peaks and the body hits its new set point, the shivering stops. This rising phase is when your child feels the worst: chills, goosebumps, sometimes teeth chattering. It typically lasts anywhere from a few minutes to roughly 20 or 30 minutes before the temperature stabilizes.
What to Do Right Now
While your child is actively shivering, give them a light blanket. This isn’t counterproductive. Trying to cool a shivering child down will only make the shivering harder and more uncomfortable. Once the chills pass and the fever plateaus, you can remove the extra layer. The general rule from the American Academy of Pediatrics is to dress a feverish child in a single layer of clothing and add a blanket only during the shivering phase.
Keep the room at a comfortable temperature. You don’t need to crank the heat up, but don’t aim for cold air either. A normal room setting, around 68 to 72°F, works well.
Fever-Reducing Medicine
You don’t need to treat every fever with medicine. Fever itself helps the immune system fight infection. The reason to give a fever reducer is comfort: if your child is miserable, can’t sleep, or won’t drink fluids, medicine can help.
Acetaminophen (Tylenol) can be given every 4 to 6 hours, up to 5 doses in 24 hours. It should not be given to infants under 8 weeks old. Ibuprofen (Advil, Motrin) can be given every 6 to 8 hours, up to 4 doses in 24 hours, but not to babies under 6 months. Always dose by your child’s weight, not their age. The weight-based dosing chart on the product label or your pediatrician’s handout is the safest guide.
Don’t give both medicines at the same time unless your doctor has specifically told you to alternate them. And never give aspirin to a child or teenager.
Keep Fluids Going
Fever increases fluid loss through sweating and faster breathing, so dehydration is the main practical risk to watch for. Small, frequent sips work better than trying to get your child to gulp down a full cup at once.
For babies under 1 year, stick with breast milk, formula, or an oral rehydration solution like Pedialyte. Use a syringe or spoon to offer 1 to 2 teaspoons every 5 to 10 minutes. Avoid plain water (unless mixing formula), fruit juice, and sugary drinks at this age.
For kids over 1, you can offer water, popsicles, Jell-O, diluted clear juices like apple juice, or an oral rehydration solution. Start with about a tablespoon every 20 minutes and gradually increase. Sports drinks are not a good substitute for an actual rehydration solution because the sugar and electrolyte balance is wrong for young children.
Signs of Dehydration
Check for these throughout the illness:
- No wet diaper for more than 12 hours, or fewer than 3 wet diapers in a day for babies 4 months and older
- Very dark urine
- Dry or sticky mouth, no tears when crying
- Sunken-looking eyes
- In babies, a soft spot on the head that looks flat or sunken
- Unusual sleepiness or confusion
Any of these warrant a call to your pediatrician or a visit to urgent care.
Things That Make It Worse
Cold baths, ice packs, and alcohol rubs are old remedies that backfire. They drop the skin temperature so fast that the body responds with harder shivering, which drives the internal temperature up further. A lukewarm (not cold) sponge bath is acceptable if the fever is high and your child isn’t shivering, but skip it entirely during the chills phase. The goal is gradual comfort, not rapid cooling.
Shivering vs. a Febrile Seizure
This is the distinction most parents worry about, and the differences are clear once you know what to look for. Normal fever shivering involves visible trembling, but your child stays conscious. They can look at you, respond to their name, and their face moves normally.
A febrile seizure looks different. Your child loses consciousness. Their eyes may roll back. The movements are rhythmic, stiff jerking of the arms and legs rather than fine trembling, and the face and jaw are often involved. Seizures typically last under 5 minutes. If this happens, lay your child on their side on a flat surface, don’t put anything in their mouth, and call 911 if it lasts longer than 5 minutes or if it’s their first seizure.
When a Fever Needs Medical Attention
Age matters more than the number on the thermometer for very young babies. Any fever above 99.4°F (rectal) in a baby 3 months or younger needs same-day medical evaluation, even if the baby seems fine otherwise. At that age, a fever can signal a serious infection that doesn’t show obvious symptoms yet.
For children 3 months to 3 years, temperatures above 101.3°F are considered a high fever. For kids over 3, the high-fever threshold is about 103°F. A high number alone doesn’t always mean something dangerous, but it’s a reason to call your pediatrician, especially if the fever persists beyond 3 days or keeps climbing despite medicine.
At any age, seek immediate care if your child has:
- A rash with purple or blood-colored spots or dots
- Stiff neck or neck pulling backward
- Difficulty breathing, grunting, or struggling for each breath
- Extreme lethargy, meaning hard to wake up or acting confused
- Bluish color around the lips or fingernails
- Repeated vomiting or bloody diarrhea
- A seizure
- A high-pitched, unusual cry (in infants)
These symptoms suggest the underlying illness, not the fever itself, may need urgent treatment.