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Febrile seizure (child)

Febrile Konvulsion

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Frightening in a child but usually harmless — it does not mean epilepsy.

Also known as: febrile convulsion · fever fit

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This compilation is for information and replaces neither medical diagnosis nor treatment. If you have symptoms, see a doctor.

A febrile seizure is deeply frightening for parents — and yet harmless in the vast majority of cases. It occurs in some young children (mostly between six months and five years) when the fever rises quickly: the child briefly loses consciousness, stiffens or jerks all over, the eyes roll up, sometimes the lips turn bluish. Such a simple febrile seizure usually lasts only one to two minutes and stops on its own; it leaves no brain damage and does not mean the child has epilepsy. In the moment, it’s important to stay calm, protect the child from injury (onto a soft, safe surface, nothing in the mouth) and watch the time. Call emergency 144 if the seizure lasts longer than about five minutes, if it repeats, if the child doesn’t properly come round afterwards, or if it’s the first seizure — when in doubt, always have it checked. Three things come in that decide what to do in the moment. **A child under one year always belongs in hospital after a febrile seizure** — at that age meningitis cannot be read off the child, and the guideline provides for an examination of the spinal fluid. **A seizure affecting only one side of the body**, or weakness on one side that lasts afterwards, is likewise a reason for hospital, even if the seizure was short. And what came before counts: a known nervous-system condition lowers the threshold.

The one thing to keep in mind behind every febrile seizure is meningitis. Its signs: a stiff neck, a child who does not properly wake after the seizure, a bulging fontanelle in an infant, and spots on the skin that do not fade when pressed with a glass. Each of these means an emergency call, regardless of how long the seizure lasted.

Levers & pathways

associatedStay calm & watch the time

Note the duration — most seizures end on their own after 1-2 minutes.

associatedProtect from injury

Onto a soft, safe surface, nothing in the mouth, don’t restrain.

associatedGet checked afterwards

Even after a short first seizure, have the child checked.

associated⚠️ 144 with warning signs

Long/repeated seizure or a dazed child → 144 at once.

traditionalFebrile seizure: what to do

Lay the child on the floor, clear the surroundings, put them in the recovery position, look at the clock — and stay there.

infoWhat the medicine does — and what it does not

Fever reducers do not prevent febrile seizures — that has been tested in studies and is one of the most persistent misconceptions. The trigger is the rapid rise, not the height. A simple seizure lasts under fifteen minutes and stops by itself; an emergency medicine is kept ready in case it runs longer than five minutes. Three to four out of a hundred children between six months and five years have one; the risk of later epilepsy is barely raised by it.

infoNumbers and timeframes

Three to four in a hundred children between six months and five years are affected. A simple seizure lasts under fifteen minutes, is on both sides and does not repeat within twenty-four hours. After a first seizure about one in three children has a second, usually within a year. The risk of later epilepsy after a simple seizure is about two in a hundred — barely higher than without. From five minutes the emergency medicine is given.

Possible complaints

associatedFrightening, usually harmless

The simple febrile seizure leaves no damage.

associatedWith a rapid fever rise

Mostly in young children, when the fever climbs fast.

associatedNot the same as epilepsy

A febrile seizure does not mean the child has epilepsy.

associated⚠️ When to call 144

Longer than ~5 min, repeats, no proper waking after, or first seizure → 144.

Blood values

studiedGlucose

Is measured at once with every seizure in childhood, because low blood sugar produces the same scene and is fixed within minutes.

studiedSodium

A low sodium — for instance after much vomiting or over-diluted feeds — sets off seizures, even without fever.

associatedCalcium in blood

Especially in infants a possible cause, often together with a marked vitamin D shortage.

associatedBlood count

Looks for the cause of the fever, not for the cause of the seizure. The febrile seizure itself leaves no trace in the blood.

Nutrients

studiedFluid

Fever, sweating and faster breathing clearly raise the need. Drinking enough keeps the mucus thin and the circulation steady — in children and older people it is the most important point of all.

associatedVitamin D

With low levels airway infections occur somewhat more often; correcting a deficiency makes sense, a high single dose during the infection does not act on it.

associatedZinc

Needed by the defence cells. For lozenges at the start of a cold there are hints of a slightly shortened duration; at a high dose over months zinc lowers copper.

studiedProtein

Antibodies and defence cells are protein. After several days with little appetite it is worth at least keeping the protein up — soup with egg, quark, yoghurt, lentils.

Supplements

mixedIron

Children with febrile seizures more often have low ferritin in several studies. Whether that is causal is open — measured and, if deficient, replaced by weight and on medical instruction.

mixedZinc

The same link has been described for zinc, again without proof of cause. No supplement prevents a febrile seizure, and lowering the fever does not either — that is the statement most often missing.

infoVitamin D3 (+K2)

Clearly worthwhile and well studied when deficient; fewer data for the wider uses. Fat-soluble — check blood levels at high doses.

Hormones

studiedCortisol

The body’s own cortisol is lowest in the evening, and exactly then fever rises fastest. This is why febrile seizures mostly occur in the evening and in the first hours of the fever — not at the highest temperature but at the steepest rise.

infoT4 (thyroxine)

Fever-lowering medicines do not prevent a febrile seizure — that has been tested repeatedly in studies and is the statement most often missing. They make the child more comfortable, nothing more.

Food

infoDrinking during fever

Children lose more fluid in a fever. Offering small amounts often works better than large ones at once. The seizure itself cannot be prevented by diet — said clearly.

Alternative approaches — what people use

no studiesHeat & cold

Lowering the fever does not prevent the seizure — this has been tested in studies and belongs said, because many parents blame themselves. Cool leg wraps make the child more comfortable, nothing more.

📄 Guideline

AWMF 022-005 · S1 · 2021-09 — in force

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checked 2026-09