What causes seizures?

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Learn about what causes seizures, the different types of seizures and what the concept of the seizure threshold means.

Key points

  • A provoked seizure has a direct cause such as a head injury, an infection or low blood sugar.
  • An unprovoked seizure does not have an immediate cause. A child must have two or more unprovoked seizures before epilepsy will be considered or have one seizure and an underlying condition with a high risk of more seizures.
  • A seizure threshold is a person's likelihood to have a seizure. The higher the threshold, the less likely it is that a seizure will happen.
  • Factors that raise a seizure threshold include getting enough sleep every night and taking anti-epileptic drugs according to instructions.
Last updated: March 17th 2021