Migraine aura and focal seizures can both cause visual, sensory, language and cognitive symptoms. The distinction can be difficult when an episode is brief, unusual or not followed by a typical migraine headache.
Visual symptoms are a common source of confusion
Migraine aura often evolves gradually over minutes and may spread across the visual field, commonly with scintillating or geometric phenomena.
Occipital seizures more often begin abruptly, are shorter and can produce highly stereotyped coloured or elementary visual phenomena, although there is substantial overlap.
Time course is often more useful than the symptom name
A tingling sensation, speech disturbance or visual change can occur in either condition.
The speed of onset, progression, duration and sequence of symptoms can be more informative than the label attached to the symptom.
Headache does not exclude epilepsy
Headache can occur before, during or after epileptic seizures.
Conversely, some migraine aura episodes occur without headache, so absence of pain does not rule migraine out.
EEG and MRI answer different questions
EEG can support epilepsy if epileptiform abnormalities are present, but a normal EEG does not exclude focal seizures.
MRI may be indicated when the presentation is atypical or there are focal neurological concerns, but a normal MRI does not distinguish migraine from epilepsy.
Both disorders can coexist
People with epilepsy have higher rates of migraine than the general population, so not every new visual or sensory event in a person with epilepsy is necessarily another seizure.
Careful event-by-event description remains important.
A prolonged new neurological deficit is an emergency problem
Sudden or persistent focal deficits can indicate stroke or another acute neurological disorder.
A known history of migraine or epilepsy should not automatically be used to explain a new atypical event.
Related reading
Sources and further reading
Evidence checked: September 2026.