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Epilepsy: signs, diagnosis & outlook

Seizure vs Epilepsy: Key Differences Explained

Last updated 28 October 2026 · 7 min read · By Sarah M., Support Coordinator
In short

Seizure vs epilepsy comes down to this: a seizure is a single event caused by sudden, uncontrolled electrical activity in the brain, while epilepsy is a condition in which seizures keep happening. Anyone can have a seizure, but epilepsy is diagnosed by a medical specialist after at least two unprovoked seizures.

This guide explains the difference and some related terms, such as PNES and febrile seizures. For symptoms, see our guide to the symptoms of epilepsy.

Key points

  • A seizure is an event; epilepsy is a condition of recurrent seizures, so every person with epilepsy has seizures but not everyone who has a seizure has epilepsy.
  • Epilepsy is diagnosed by a medical specialist after at least two unprovoked seizures, using a description of the seizures and tests such as an EEG.
  • Your doctor will ask what the seizure looked like, so write down what happened as carefully as you can.
  • Follow the person’s own seizure management plan and call 000 in an emergency.
FeatureSeizureEpilepsy
What it isA sudden, uncontrolled change in the brain’s electrical signalsA neurological condition marked by recurrent seizures
Who it affectsAnyone can have a seizurePeople who have recurrent seizures
Who assesses itA doctor, starting with a description of what happenedA medical specialist
How it is diagnosedHistory, examination and testsAfter at least two unprovoked seizures, often with tests such as EEG, CT and MRI
How long it lastsAn event; a febrile seizure usually happens only onceA condition of recurrent seizures; your specialist can explain the outlook
DrivingA first unprovoked seizure must be reported to the driver licensing authorityAsk your specialist and the driver licensing authority about the rules for you
Seizure vs epilepsy at a glance
Simple answerA seizure is one event; epilepsy is recurrent seizures
Who diagnoses epilepsyA medical specialist, after at least two unprovoked seizures
Common testsPhysical examination, pathology tests, EEG, CT and MRI
EmergencyCall 000
Official sourcesEpilepsy Foundation, Epilepsy Action Australia and healthdirect

What is a seizure?

healthdirect explains that seizures happen when there are sudden and uncontrolled changes to electrical signals in the brain (healthdirect).

  • Epilepsy is diagnosed after at least two unprovoked seizures, so whether a seizure was provoked matters for diagnosis.
  • About 1 in 30 children will have a febrile seizure, usually only once, according to healthdirect.
  • A person who has a seizure should see a doctor, who will ask for a description of what the seizure looked like.

What is epilepsy?

The Epilepsy Foundation describes epilepsy as a medical condition that affects the brain and causes seizures, and one of the most common neurological disorders (Epilepsy Foundation). For a plain definition, read what epilepsy is.

  • Epilepsy is diagnosed by a medical specialist after a person has at least two unprovoked seizures.
  • Seizures in epilepsy are grouped as focal, generalised or unknown onset under the 2017 classification from the International League Against Epilepsy (Epilepsy Action Australia).
  • Focal seizures start in one small region of the brain, while generalised seizures affect both hemispheres from the start.
  • For more on different ages, see childhood epilepsy and epilepsy in adults.

Key differences in seizure vs epilepsy

If you are asking whether a seizure and epilepsy are the same, these are the points that separate them.

  1. One event versus a pattern. A seizure is a single episode, while epilepsy means seizures keep recurring over time.
  2. Unprovoked seizures. The diagnosis of epilepsy is based on unprovoked seizures.
  3. Diagnosis. A specialist diagnoses epilepsy after at least two unprovoked seizures. See how epilepsy is diagnosed.
  4. Testing. Doctors often use an examination, pathology tests, an electroencephalogram (EEG), CT and MRI (Epilepsy Foundation).
  5. Driving. A person who has a first unprovoked seizure must report it to the driver licensing authority, and a private conditional licence may be considered when there have been no further seizures for at least 6 months (Assessing Fitness to Drive).
  6. Planning. Ask your doctor or specialist what follow-up you need after any seizure.
Looking for NDIS support at home?

TQN Care support workers help with personal care, community access, respite and help around the home across Sydney, Melbourne and surrounding areas (NSW & VIC). Tell us what you need and we will call you back.

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Epilepsy without seizures, non-seizure epilepsy and pseudo epilepsy

Several terms describe things that sound close to epilepsy, and your specialist is the best person to explain which applies to you.

TermWhat to know
Epilepsy without seizuresEpilepsy happens when you have recurrent seizures, so ask your doctor about any episodes you are unsure of.
Epilepsy without convulsionsDescribe any unusual episode to your doctor, even if there was no shaking.
PNES vs epilepsyPNES stands for psychogenic non-epileptic seizures; a specialist assessment is needed to work out what is happening.
Pseudo epilepsyNot a term to diagnose yourself with; ask your specialist which diagnosis applies.
Seizure disorder vs epilepsyIf a doctor uses this term, ask them what they mean and whether it is epilepsy.

Never decide on a diagnosis yourself; a proper assessment by a specialist is what sorts these out. Our guides to epilepsy and other conditions and autism and epilepsy cover conditions that can sit alongside epilepsy.

Pathophysiology of seizures and epilepsy in plain words

In simple terms, brain cells communicate with electrical signals, and a seizure is a sudden burst of uncontrolled activity. Epilepsy happens when you have recurrent seizures. A specialist can explain what is happening in your own brain, and our guide on whether you can grow out of epilepsy explains what outcomes may look like.

Which is right for you?

This table shows what to do in each situation, and your doctor can fill in the details.

Your situationWhat to do next
You had a first seizureSee your GP promptly, describe what happened and report it to the driver licensing authority if it was unprovoked.
Your child had a fever-related seizureTalk to your GP or paediatrician about what it means and whether any follow-up is needed.
You have had two or more seizuresAsk for a referral to a specialist, who can assess whether you have epilepsy.
Someone you support has epilepsyKeep the seizure management plan visible, and call 000 in an emergency.
Looking for NDIS support at home?

TQN Care support workers help with personal care, community access, respite and help around the home across Sydney, Melbourne and surrounding areas (NSW & VIC). Tell us what you need and we will call you back.

Make a referral →

Your next step

If you or someone you care for has epilepsy and needs hands-on help, TQN Care provides trained support workers who follow each person’s seizure management plan. Our high-care and complex support service covers personal care and community access, and our guide to high intensity supports explains what that can include. Tell us what you need and we will call you back.

SM
Sarah M., Support CoordinatorTQN Care is a registered NDIS provider supporting people across Sydney, Melbourne and surrounding areas (NSW & VIC).
Common questions

FAQs about seizure vs epilepsy

Can you have epilepsy without seizures? +

Epilepsy is diagnosed after at least two unprovoked seizures, and it happens when you have recurrent seizures. If you have had unusual episodes you are unsure about, describe them to your GP or specialist.

Is a seizure and epilepsy the same thing? +

No. A seizure is a single episode of sudden, uncontrolled electrical activity in the brain, while epilepsy means recurrent seizures diagnosed by a specialist. Anyone can have a seizure, so a doctor needs to assess what happened.

Does a febrile seizure mean epilepsy? +

About 1 in 30 children will have a febrile seizure, usually only once. Ask your GP or paediatrician whether a febrile seizure affects epilepsy risk for your child, and call 000 if a seizure is prolonged or you are worried.

How is PNES different from epilepsy? +

PNES stands for psychogenic non-epileptic seizures. A proper assessment by a specialist is needed to say whether episodes are PNES, epilepsy or something else, so do not assume either diagnosis without it.

References

Sources

  1. Seizures — healthdirect Australia
  2. What is epilepsy? — Epilepsy Foundation
  3. Diagnosis — Epilepsy Foundation
  4. Seizure types and classification — Epilepsy Action Australia
  5. Assessing Fitness to Drive: seizures and epilepsy — Austroads
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