Febrile seizures

Also called Febrile convulsions or Fever fits

A febrile seizure is a fit that happens when a young child has a high temperature, usually between the ages of 6 months and 3 years. The child may go stiff, lose consciousness and their arms and legs may twitch. Most seizures last less than 5 minutes and do not cause lasting harm.

Last updated Nov 9, 2026

What it is

They are usually triggered by a common infection, such as a cold, flu or an ear infection. Some children have more than one, but most stop having them by the age of 5 or 6.

Having febrile seizures only slightly raises the chance of developing epilepsy later.

Common signs

  • Body going stiff and arms and legs twitching
  • Loss of consciousness
  • Eyes rolling back
  • Sleepiness or confusion for up to an hour afterwards

How it is usually diagnosed

  • A description of the seizure
  • Examination to find the cause of the fever
  • Urine or blood tests, sometimes

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Notes about each seizure: date, length and temperature
  • Hospital or emergency discharge letters
  • Any test results

Questions to ask your doctor

  • What caused the fever this time?
  • What should I do if it happens again?
  • Does my child need any further tests?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • A first seizure, a seizure lasting more than 5 minutes, or a child who does not wake up afterwards: call 112

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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