Last updated 31 October 2026 · 8 min read · By Sarah M., Support Coordinator
In short
Yes, you can develop epilepsy later in life. Epilepsy Action Australia says seizures can begin at any age, and that epilepsy is most frequently diagnosed in childhood and in people over 65. This guide covers adult symptoms, causes, assessment and support, and builds on our guide to the symptoms of epilepsy.
Key points
Epilepsy can start at any age, and Epilepsy Action Australia says it is most frequently diagnosed in childhood and in people over 65.
Epilepsy Action Australia states epilepsy is the fourth most common neurological condition, after migraine, stroke and dementia.
In about half of people diagnosed, the cause is never known, so not finding a cause is common.
Only a doctor can diagnose epilepsy; if you notice possible seizures, see your GP, write down what happened, and call 000 in an emergency.
Can you develop epilepsy later in life: at a glance
Can it start in adulthood?
Yes. Seizures can begin at any age (Epilepsy Action Australia)
When is it most often diagnosed?
In childhood and in people over 65 years of age
How common
The fourth most common neurological condition, after migraine, stroke and dementia
Where to start
Your GP, who can explain the next steps, including whether you need a specialist
NDIS relevance
If you meet the NDIS access requirements, the NDIS may fund supports linked to your disability
Can you develop epilepsy later in life?
Yes. Late onset epilepsy, also called adult onset epilepsy, means epilepsy that starts in adulthood.
Any age: Epilepsy Action Australia states that seizures can begin at any age (Epilepsy Action Australia).
Peak ages: epilepsy is most frequently diagnosed in childhood and in people over 65 years of age.
Common condition: it is the fourth most common neurological condition, after migraine, stroke and dementia.
Different from a single seizure: a seizure and epilepsy are not the same thing; see seizure vs epilepsy.
Children and adults: if you are looking for information on younger people, see childhood epilepsy.
Can epilepsy start later in life: what can cause it?
Epilepsy Action Australia lists several causes, and in many cases none is found (What is epilepsy).
Head injury: a past injury to the head is listed as a cause.
Stroke or brain haemorrhage: both are on the list.
Lack of oxygen to the brain: this is another listed cause.
Brain infections and brain tumours: both appear in the list of causes.
Brain abnormalities present at birth, and genetic factors: these are also listed.
Unknown: in about half of people diagnosed, the cause is never known.
For more detail, read what can cause epilepsy. Your specialist is the right person to discuss what may apply to you.
Epilepsy symptoms in adults: signs to notice
Seizures can look different from person to person, so write down what you or others notice.
What to note
Why it helps
What happened before, during and after
Gives your doctor a clear picture of the event
How long it lasted
Adds detail your doctor may ask about
Where you were and what you were doing
Gives your doctor context about the event
What a witness saw
You may not remember the event yourself
Any video taken safely by a bystander
Can show your doctor what happened, if it can be recorded without delaying help
Signs of epilepsy in adults, including early or mild symptoms, are not always obvious. Only a doctor can tell whether an event was a seizure, so see your GP rather than waiting.
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.
See a doctor promptly if anything on this list applies, and call 000 in an emergency.
You have had an event you think may have been a seizure, even if it was brief and you felt fine afterwards.
Someone has told you that you lost awareness, behaved oddly or moved unusually and you do not remember it.
You have a known condition and your events are changing in how often they occur, how long they last or what they look like.
You are worried about safety at home, at work, when driving or when caring for others.
You need a letter or report for the NDIS, your employer or a support service.
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.
If you or someone you care for lives with epilepsy and needs practical support, TQN Care can help. Our support workers assist with personal care, community access and help around the home, including higher-care needs, across Sydney, Melbourne and surrounding areas (NSW & VIC). See our high-care and complex support page or make a referral 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 epilepsy in adults
Can you get epilepsy later in life? +
Yes. Epilepsy Action Australia states that seizures can begin at any age, and that epilepsy is most frequently diagnosed in childhood and in people over 65. If you are worried, see your GP and write down what happened.
Can epilepsy start later in life without a cause? +
Yes. Epilepsy Action Australia says that in about half of people diagnosed, the cause is never known. Listed causes include head injury, stroke, brain infections and brain tumours. Your specialist can discuss what may apply to you.
What are early signs of epilepsy in adults? +
Seizures can look very different between people, and only a doctor can say whether an event was a seizure. Write down what happened, how long it lasted and what a witness saw, then see your GP. Call 000 in an emergency.
What is the treatment for epilepsy in adults? +
Treatment is decided by your doctor or specialist based on your type of epilepsy and your health. Never start, stop or change a medicine without medical advice, and ask for a written seizure management plan.