Imagine your little one is playing happily with their toys, and suddenly their body begins to shake. Their eyes roll upward, and their arms and legs become stiff as a board. When you place your hand on their skin, you feel intense heat radiating from them. You realize right away that your child has a fever.
As a parent, seeing this happen for the first time is one of the most frightening experiences imaginable. Your heart races, and you might feel completely helpless. This scary medical event is known as a febrile seizure. While witnessing a seizure is terrifying, the reassuring truth is that most febrile seizures are harmless and do not cause long-term health problems.
By staying calm and learning the facts, you can protect your child and handle the situation with confidence. Let us walk through everything you need to know about febrile seizures, what causes them, and how to respond safely.
Key Takeaways at a Glance
- Febrile seizures are triggered by high body temperatures in young children, usually between 6 months and 6 years of age.
- Most seizures last only a minute or two and stop on their own without causing brain damage.
- During an episode, stay calm, place your child safely on the floor, and turn them onto their side.
- Never put anything into your child's mouth, and do not try to hold them down or stop the shaking.
- Always contact your doctor after a first seizure, and call emergency services (911 or 999) if the seizure lasts longer than five minutes.
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Why Do Febrile Seizures Happen?
Doctors and scientists do not yet know the exact reason why some children have febrile seizures while others do not. However, we do know they are linked to a rapid rise in body temperature. Most of the time, the child's core temperature climbs above 38 degrees Celsius (100.4 degrees Fahrenheit).
Sometimes, the speed at which the fever spikes matters more than the actual height of the temperature. A sudden, sharp jump in temperature can trigger unusual electrical activity in a young child's developing brain. In fact, many parents do not even realize their child has a fever until the seizure begins and they touch the child's warm skin.
A young child's brain is still growing and developing rapidly. Because the nervous system is immature, it reacts more sensitively to sudden temperature changes. As your child grows older, their brain matures, and their nervous system becomes much better at handling fevers.
Which Children Are Most Likely to Get Febrile Seizures?
Febrile seizures can happen to children between the ages of 3 months and 6 years. However, they are most commonly seen in toddlers between 12 and 18 months of age. By the time a child reaches 6 years old, these seizures almost always stop happening on their own.
Certain risk factors make a febrile seizure more likely to occur:
- Family History: If you, your partner, or an older sibling had febrile seizures as a child, your little one has a higher chance of having them too.
- Recurrence Risk: Once a child has had a single febrile seizure, there is a moderate chance they may have another one during future fevers.
What Does a Febrile Seizure Look Like?
Febrile seizures are generally divided into two main categories: simple and complex. Understanding the difference helps you know what to expect and when to seek extra medical attention.
| Feature | Simple Febrile Seizure | Complex Febrile Seizure |
|---|---|---|
| Duration | Most common type. Usually lasts less than two minutes, though it can last up to 15 minutes. | Less common. Lasts longer than 15 minutes. |
| Body Involvement | Affects the entire body. Both arms and legs shake rhythmically. | May affect only one side or one specific part of the body, such as a single arm or leg. |
| Frequency | Occurs only once within a 24-hour period. | Can occur more than once within a 24-hour period. |
| Recovery | Child may feel sleepy, grumpy, or confused for a few hours afterward. | May leave temporary weakness in the affected limb after the shaking stops. |
Complex febrile seizures require closer medical observation and follow-up. If your child experiences a complex seizure, your doctor may recommend further diagnostic tests, such as blood work, imaging scans, or sometimes a lumbar puncture (spinal tap) to rule out serious brain infections.
What Causes the Underlying Fever?
For a febrile seizure to happen, the child must first have a fever. Common childhood illnesses that trigger these fevers include:
- Viral Infections: Common cold viruses, flu viruses, and ear infections often cause fevers. A viral illness called roseola infantum often causes a sudden, high fever that can trigger a febrile seizure.
- Vaccine Reactions: Routine childhood immunizations can sometimes cause a mild fever as the immune system builds protection. For example, the MMR vaccine can sometimes cause a fever 8 to 14 days after injection.
What Should I Do If My Child Has a Seizure?
Knowing what to do during a seizure is the best way to keep your child safe. Staying calm allows you to protect them from accidental injury.
| ✔️ What to Do | ❌ What NOT to Do |
|---|---|
| Lay your child gently on the floor or ground away from hard or sharp objects. | Never put anything into your child's mouth, such as fingers, spoons, or keys. |
| Roll your child carefully onto their side to keep their airway clear of saliva or vomit. | Never try to hold your child down or restrain their shaking movements. |
| Loosen any tight clothing around their neck and chest to make breathing easier. | Do not put your child in a cold bath or ice water to lower the fever. |
| Note the exact time the seizure started so you can tell the doctor later. | Do not give oral medicine or liquids while the seizure is happening. |
Once the seizure stops, check on your child. If they are breathing normally and waking up, comfort them gently. Always contact your pediatrician after a seizure so they can examine your child and find the source of the fever.
When Should I Seek Emergency Medical Care?
Most febrile seizures stop on their own within a few minutes and do not require an emergency hospital visit. However, certain warning signs mean you need immediate medical help.
Emergency Red Flags: Call 911 or 999 Right away
- The seizure lasts longer than 5 minutes, or does not stop on its own.
- Your child has trouble breathing, or their lips and face turn a bluish color.
- The seizure affects only one side or part of your child's body.
- Your child remains unusually sleepy or unresponsive for more than an hour after the seizure stops.
- Your child shows signs of severe dehydration, such as a dry mouth, sunken eyes, or no wet diapers for many hours.
- A second seizure occurs within a 24-hour period.
Will This Happen Again? Are There Treatments?
About 30% to 35% of children who have a febrile seizure will experience another one during a future illness. The risk is higher if the child was under 15 months old during their first episode, or if there is a strong family history of febrile seizures.
Even if your child has another seizure, it does not mean they will have one every time they get a fever. Most children outgrow them completely by age 6.
For simple febrile seizures, doctors do not recommend daily seizure medicines because the risks of the medicine outweigh the benefits. However, if your child has prolonged or complex seizures, your pediatrician may prescribe a rescue medicine, such as diazepam rectal gel, to stop long seizures at home. Always follow your doctor's exact instructions.
Will Febrile Seizures Cause Other Problems for My Child?
It is completely normal to worry that a seizure might harm your child's brain. Rest assured that simple febrile seizures do not cause brain damage, intellectual disability, or learning difficulties.
A febrile seizure is also very different from epilepsy. Epilepsy is a condition where a person has repeated seizures without a fever. Having a febrile seizure only raises a child's future risk of developing epilepsy by a tiny amount (about 2 percent), which is very close to the risk for any child in the general population.
After recovering from a febrile seizure, your child will continue to grow, learn, and develop normally.
💡 Take-Home Message
Febrile seizures can be frightening to watch, but they are usually harmless and brief. By knowing how to keep your child safe, staying calm, and seeking medical advice when needed, you can manage fevers and seizures with confidence. Your child will bounce back quickly and continue living a happy, healthy life.
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