Febrile Seizures in Toddlers: What to Do and When to Call 911

If you are reading this because your toddler just had a seizure with a fever, take a breath. I know that sounds impossible. As a pediatric nurse and a mom, I can tell you this is one of the scariest things a parent can witness.

The reassuring truth: most febrile seizures are short, stop on their own, and do not cause brain damage. You still need to know exactly what to do in the moment and when it crosses the line into “call 911 right now.” I will walk you through both.

What is a febrile seizure?

A febrile seizure is a seizure that happens in a young child in the setting of a fever, usually early in an illness. They most often occur between 6 months and 5 years, with the peak around toddler age.

During a febrile seizure, a child may:

• Stiffen, then shake or jerk their arms and legs
• Roll their eyes upward
• Become unresponsive for a short time
• Drool or foam a little at the mouth
• Have a brief color change (pale or dusky around the lips can happen during a seizure). If blue color persists or breathing does not normalize afterward, treat it as an emergency.
• Urinate or have a bowel movement (yes, it happens)

Afterward, many kids are sleepy, confused, or clingy for a bit. That post-seizure phase is called postictal. It often lasts minutes to a couple of hours, with a gradual return toward baseline.

Why do they happen with fevers?

Febrile seizures often happen early in an illness. They may be related to how a child’s brain responds to a fever and to temperature changes. They can happen even with a moderate fever, and sometimes before parents realize their child is sick.

Common illnesses associated with fevers (and therefore febrile seizures) include:

• Common viral infections (cold viruses, flu-like viruses)
• Roseola (often fever first, rash later)
• Ear infections
• Stomach viruses

In most cases, febrile seizures are not a sign of meningitis, epilepsy, or brain injury. But because a seizure can also happen for serious reasons, it is important to know when emergency evaluation is needed.

Simple vs. complex febrile seizures

Clinicians usually classify febrile seizures as simple or complex. This helps guide how urgently a child needs workup.

Simple febrile seizure

• Lasts less than 15 minutes
• Generalized shaking (both sides of the body)
• Happens once in a 24-hour period
• Child was otherwise developing typically before the illness

These are the most common type and the most reassuring in terms of outcomes.

Complex febrile seizure

• Lasts 15 minutes or longer, or
• Has focal features (only one side of the body, like one arm jerking, or the eyes and head turned to one side), or
• Happens more than once in 24 hours

Complex does not automatically mean “dangerous,” but it does raise the need for prompt medical evaluation.

What to do during a febrile seizure

Your job is not to stop the seizure. Your job is to keep your child safe and get help if needed.

1. Start a timer. Use your phone. Time feels distorted during emergencies, and this matters for deciding whether to call 911.
2. Lay your child on their side on the floor or a flat surface. The side position helps saliva or vomit drain out instead of being inhaled.
3. Move hard or sharp objects away. Clear the area around their head and arms.
4. Loosen tight clothing around the neck.
5. Stay with them and watch closely. If you can, note what you see: whole body versus one side, eye direction, color changes, any breathing changes.
6. If they are in a dangerous spot, move them only as needed. For example, away from a bathtub edge or down from a high bed.

If you are able, a short video (10 to 20 seconds) can be incredibly helpful for your pediatrician later. Only do this if your child is already safe and you are not delaying emergency care.

What not to do

• Do not put anything in their mouth. Not a spoon, not a finger, not medicine, not water. Kids do not swallow their tongues, but they can choke or get injured.
• Do not hold them down. Restraining can cause injury.
• Do not try to force fever medicine during the seizure. It is a choking risk.
• Do not put them in a cold bath or use ice. It can cause shivering and discomfort and does not safely treat the underlying issue.
• Do not start CPR during the seizure. If the seizure ends and your child is not breathing normally, call 911 immediately and start CPR if instructed by the dispatcher or if you are trained and your child is not breathing.

How long do they last?

Most febrile seizures are very short, often under 1 to 2 minutes. Many feel longer because your body is on high alert.

Any seizure that lasts 5 minutes or more is treated as a medical emergency, even if it is “just a febrile seizure.”

When to call 911

Call 911 if any of the following are true:

• The seizure lasts 5 minutes or longer (or you are not sure)
• Breathing looks abnormal after the seizure stops, your child turns blue, or you cannot wake them up
• This is your child’s first seizure and you feel unsafe transporting them yourself
• The seizure is focal (only one side of the body) or your child is not moving one side normally afterward
• Multiple seizures happen in 24 hours
• Your child is under 6 months old
• There are signs of severe illness, such as a stiff neck, extreme lethargy, persistent inconsolable crying, a purple rash that does not fade when pressed, or severe trouble breathing
• The seizure happened without a fever (or you cannot confirm fever)
• Your gut says something is very wrong. You are not wasting anyone’s time.

If you call 911, keep your child on their side and keep timing until help arrives.

When to call the pediatrician

If the seizure stopped quickly and your child is breathing normally, you usually still need medical guidance the same day.

Call your pediatrician promptly if:

• The seizure lasted less than 5 minutes and your child is now waking up and breathing normally
• This seems consistent with a simple febrile seizure
• Your child is drinking some fluids and gradually returning to themselves

First seizure note: If this was your child’s first seizure, many clinicians recommend a same-day, in-person evaluation even if it was brief and your child looks better. That does not mean something terrible is expected. It means we take seizures seriously and we want to confirm the fever source and rule out other causes.

What to expect at the doctor or ER

Most of the workup is a careful history and exam. Expect questions like:

• How high was the fever and when did it start?
• How long did the seizure last?
• Was it whole-body or one-sided?
• Was there any breathing trouble?
• Is your child back to baseline?
• Any recent illness exposures, vaccinations, travel?

Many children with a typical simple febrile seizure do not need brain imaging, EEGs, or extensive lab work. Testing, if any, is usually focused on finding the fever source (for example, checking for ear infection, flu or COVID testing in season, or urine testing in certain age groups).

Will it happen again?

Sometimes, yes. About 1 in 3 children who have a febrile seizure will have another one with a future fever. The risk is a bit higher if:

• Your child was younger at the first seizure (especially under 18 months)
• Fever was not very high when the seizure happened
• There is a family history of febrile seizures
• They have frequent febrile illnesses (hello, daycare years)

Even if it happens again, it is usually the same pattern: short, generalized, and self-limited.

Brain damage or epilepsy?

This is the fear that keeps parents awake for weeks afterward. Here is the evidence-based reassurance:

• Simple febrile seizures do not cause brain damage.
• Most children with febrile seizures have normal development and do just fine in school and life.
• The vast majority do not go on to develop epilepsy.

Compared with kids who never have a febrile seizure, the risk of epilepsy later is slightly higher, but it is still low overall. Many references describe epilepsy risk at about 1 percent in the general population, and roughly 2 to 5 percent after febrile seizures overall (with higher risk in some children, such as those with complex features or underlying neurologic concerns). Your pediatrician can talk through your child’s specific risk based on seizure type, length, family history, and development.

Can fever medicine prevent it?

This is a tricky one because it feels like something we should be able to control.

Using fever reducers like acetaminophen or ibuprofen can help your child feel better, drink more, and rest. But studies show that fever medicine does not reliably prevent febrile seizures. That is because seizures often occur early in illness and can be related to how quickly temperature changes, sometimes before you even see the fever.

So what should you do?

• Treat the fever for comfort, not as a guarantee.
• Focus on hydration and monitoring overall behavior.
• Know the safety steps so you are prepared if it happens again.

Medication reminder: Use weight-based dosing. Avoid aspirin in children. If your child is under 6 months, ask your clinician before using ibuprofen. Do not alternate acetaminophen and ibuprofen unless your clinician has told you to and you have a clear schedule.

After the seizure

Once the shaking stops and your child is breathing normally:

• Keep them on their side until they are clearly awake.
• Check their temperature if you can do it safely.
• Do not offer food or drink until they are fully alert and able to swallow normally.
• Write down what happened: start time, stop time, fever reading, symptoms, and any meds given earlier.
• Call your pediatrician for next steps, or 911 if any emergency criteria apply.

Return precautions

Seek urgent care or emergency evaluation if:

• Your child is not steadily returning toward baseline within a couple of hours
• They have a stiff neck, severe headache, persistent vomiting, or worsening lethargy
• You see a new purple rash that does not fade when pressed
• They show signs of dehydration (very dry mouth, no tears, significantly fewer wet diapers)
• Breathing looks labored or abnormal

Rescue medicine (if prescribed)

Some children who have had prolonged or recurrent seizures are prescribed a rescue medicine (for example, rectal diazepam or intranasal midazolam) to use at home.

Only use a rescue medicine if your child’s clinician has prescribed it and trained you on exactly when and how to give it. If you have it, ask your pediatrician for a written seizure action plan so you are not making decisions in a panic.

Quick checklist

This is not a diagnosis, but these points can help you communicate clearly when you call for help:

• Age between 6 months and 5 years
• Fever present or developing (often early in an illness)
• Seizure is generalized and lasts under 15 minutes
• Child gradually returns toward baseline afterward

If any part does not fit, use the When to call 911 list above and seek emergency evaluation.

A simple call script

If your mind goes blank on the phone, here is a simple script:

“My toddler has a fever and just had a seizure. The seizure started at [time] and stopped at [time]. It was [whole body or one side]. They are [breathing normally / not breathing normally]. They are [waking up / still not responding]. Their temperature is [number] and we gave [medication and time] if any.”

Bottom line

Febrile seizures are terrifying to watch, but most are brief and have excellent outcomes. Focus on safety first: side position, clear the area, time it, and call 911 if it lasts 5 minutes or longer or if anything looks off.

And please hear this from a nurse who has supported many families through this: your fear is valid. You are not overreacting. You are responding to something genuinely intense. With the right steps, you can get through it, and your child will very likely be okay.

Sources and review notes

Sources:

• American Academy of Pediatrics (AAP): Clinical guidance on the neurodiagnostic evaluation of children with a simple febrile seizure
• National Institutes of Health (NIH), MedlinePlus: Febrile seizures overview for families
• Nationwide Children’s Hospital and Seattle Children’s: Parent education materials on febrile seizures and home safety steps

Medical note: This article reflects common pediatric guidance used in U.S. clinical practice. Always follow your child’s clinician and local emergency guidance, especially for infants, children with chronic conditions, or any event that does not match a typical simple febrile seizure.