Epilepsy is not a single disease with a single cause. Some epilepsies are genetic, some arise from developmental or structural abnormalities that cannot currently be prevented, and in many people the cause remains unknown. But a substantial proportion of epilepsy worldwide develops after brain injuries and diseases that public-health measures can reduce.
The World Health Organization and the International League Against Epilepsy estimate that around one quarter of epilepsy cases may be potentially preventable. That does not mean every individual case could have been avoided, nor does it mean anyone is to blame for developing epilepsy. It means that, at population level, preventing certain causes of brain injury can reduce the number of people who later develop epilepsy.
The main preventable pathways include injury around birth, central nervous system infection, traumatic brain injury and stroke. Their relative importance differs by age, geography and health-system capacity.
Prevention is about causes, not about blaming individuals
The phrase preventable epilepsy can be misunderstood. It does not mean a person could simply have behaved differently. Many preventable causes depend on sanitation, vaccination, road design, maternal care, access to trained birth attendants, infection control, cardiovascular prevention and other systems far beyond individual control.
Public-health prevention asks a different question: which upstream risks can society reduce before the brain injury happens?
The global pattern is uneven
The preventable causes of epilepsy are not distributed equally. In many lower-resource settings, perinatal brain injury and central nervous system infections contribute a larger share of epilepsy. In older adults across both high- and low-income countries, stroke is one of the most important preventable causes.
Traumatic brain injury contributes in every region, but the types of injury differ: road traffic collisions, occupational injury, violence, falls and sports-related trauma all play roles.
This means epilepsy prevention cannot be reduced to one intervention. Different populations require different strategies.
Perinatal brain injury can lead to lifelong epilepsy
Brain injury before, during or shortly after birth can create structural damage that later becomes epileptogenic. Relevant risks include severe birth asphyxia, neonatal stroke, intracranial haemorrhage, serious infection, extreme prematurity and other complications of pregnancy and delivery.
Some of these events are unavoidable even with excellent care. Others become more likely when antenatal services are limited, high-risk pregnancies are not identified, skilled birth attendants are unavailable or emergency obstetric care cannot be reached in time.
WHO and ILAE reviews identify improved maternal and newborn care as one of the major public-health routes to reducing epilepsy incidence.
Good antenatal care matters before labour begins
Preventing perinatal brain injury starts before delivery. Antenatal screening can identify hypertension, infection, fetal growth problems, diabetes and other complications that increase risk to the developing brain.
Timely management of pregnancy complications can reduce the chance of catastrophic events during labour or shortly after birth.
This illustrates an important principle: epilepsy prevention may begin years before the first seizure would otherwise occur.
Skilled birth care can reduce neurological injury
Rapid recognition of obstructed labour, fetal distress, haemorrhage and other emergencies can prevent severe hypoxic-ischaemic brain injury.
Where emergency caesarean delivery, neonatal resuscitation and specialist newborn care are unavailable, complications that would be survivable elsewhere may lead to permanent neurological injury.
Reducing this inequality is therefore part of epilepsy prevention as well as maternal and neonatal survival.
Prematurity and low birth weight are part of the picture
Very preterm infants and babies with very low birth weight are at increased risk of brain injury, including intraventricular haemorrhage and white-matter injury. These injuries can later be associated with cerebral palsy, developmental disability and epilepsy.
Prevention includes good maternal health, infection control, antenatal corticosteroids when appropriate, safe neonatal care and access to neonatal intensive care where needed.
Not every case is preventable, but population-level improvements in maternal and neonatal care can reduce risk.
Central nervous system infections remain major preventable causes
Meningitis, encephalitis, cerebral malaria, tuberculosis affecting the brain and parasitic infections can injure neural tissue and create long-term seizure risk.
The burden is greatest where infectious disease exposure is high and access to early diagnosis and treatment is limited.
Vaccination, sanitation, vector control, antimicrobial treatment and parasite-control programmes can therefore reduce not only infection-related deaths but also later neurological disability and epilepsy.
Vaccination is an epilepsy-prevention intervention
Vaccines that prevent meningitis, encephalitis and other severe infections indirectly prevent some cases of epilepsy by preventing the brain injury those infections can cause.
Examples include vaccination programmes targeting bacterial meningitis pathogens and viral infections associated with encephalitis.
The neurological benefit is rarely the headline reason for vaccination, but it is an important downstream effect.
Meningitis can leave epileptogenic injury
Bacterial meningitis can cause inflammation, infarction, cortical injury, hydrocephalus and other neurological complications. Some survivors develop epilepsy months or years later.
Prompt treatment reduces mortality and neurological injury, while vaccination can prevent many cases from occurring at all.
In settings where antibiotic access is delayed, the long-term neurological burden can be greater.
Encephalitis can alter seizure networks permanently
Viral and other forms of encephalitis can cause acute symptomatic seizures during the infection and chronic epilepsy after recovery.
Some causes are vaccine-preventable; others require vector control, early antiviral treatment or broader infection-prevention strategies.
Preventing severe encephalitis is therefore another route to reducing acquired epilepsy.
Cerebral malaria can contribute to later epilepsy
Severe malaria involving the brain can cause prolonged seizures, coma and neurological injury. In malaria-endemic regions, survivors can develop epilepsy and other neurodevelopmental problems.
Malaria prevention through mosquito control, insecticide-treated nets, preventive programmes and access to effective antimalarial treatment can therefore have long-term neurological benefits.
The importance of this pathway varies greatly by region.
Neurocysticercosis is one of the clearest examples
Neurocysticercosis occurs when larvae of the pork tapeworm Taenia solium infect the central nervous system. WHO describes it as the most frequent preventable cause of epilepsy in many endemic regions and estimates that it can account for a substantial proportion of epilepsy cases where transmission is common.
Prevention depends on sanitation, safe water, treatment of human tapeworm carriers, veterinary control, pig management, meat inspection and food hygiene.
Because its epidemiology, diagnosis and treatment are complex, neurocysticercosis is covered in its own dedicated page rather than reduced to this overview.
Traumatic brain injury is a global cause of acquired epilepsy
Severe head injury can damage cortex, create haemorrhage, scarring and network reorganisation, and lead to post-traumatic epilepsy.
The risk generally increases with injury severity, penetrating injury, intracranial bleeding and other markers of significant brain damage.
Preventing traumatic brain injury is therefore one of the most direct ways to prevent acquired epilepsy.
Road traffic injury is part of epilepsy prevention
Seat belts, motorcycle helmets, safer roads, speed regulation, drink-driving laws, vehicle safety standards and emergency trauma systems all reduce severe head injury.
These measures are usually discussed in terms of reducing deaths and disability after crashes. They also reduce the number of people who survive with brain injury severe enough to cause later epilepsy.
This is another example of epilepsy prevention happening outside neurology clinics.
Falls matter across the lifespan
Falls can cause traumatic brain injury in children, working-age adults and especially older people.
Prevention strategies include safer housing, workplace safety, vision assessment, balance and strength interventions, medication review and environmental adaptations for older adults.
The epilepsy benefit is indirect but real when severe head trauma is prevented.
Violence and conflict also cause preventable traumatic epilepsy
Assault, blast injury, penetrating trauma and other forms of interpersonal or armed violence can cause brain injuries that later become epileptogenic.
Prevention here depends on broader social, legal and political measures as much as healthcare.
The global epilepsy burden therefore intersects with violence prevention and peace as well as medicine.
Sports safety can reduce severe head injury
Most sports do not cause epilepsy. The concern is specifically significant traumatic brain injury.
Rules designed to reduce dangerous impacts, appropriate protective equipment, concussion recognition and medical management all contribute to brain-injury prevention.
This should not be confused with advising people to avoid exercise. Physical activity is generally beneficial and also supports cardiovascular health.
Stroke is one of the most important preventable causes in older adults
Stroke can damage cortical tissue and create a structural focus from which seizures later arise. In older adults, stroke is among the leading acquired causes of new-onset epilepsy.
ILAE prevention reviews identify stroke as a major preventable epilepsy pathway in both high- and low-income countries.
Preventing stroke therefore prevents some cases of post-stroke epilepsy.
Blood pressure control is an epilepsy-prevention measure too
Hypertension is one of the strongest modifiable risk factors for stroke. Detecting and treating high blood pressure reduces both ischaemic and haemorrhagic stroke risk.
From an epilepsy perspective, this means routine cardiovascular prevention can reduce later structural epilepsy.
The relationship is indirect but epidemiologically important.
Diabetes, smoking and obesity also matter
Diabetes, tobacco exposure, obesity, physical inactivity and other cardiovascular risks contribute to stroke and vascular disease.
Public-health strategies that reduce these risks can therefore reduce both stroke burden and some of the epilepsy that follows stroke.
This is why WHO includes cardiovascular risk reduction within epilepsy prevention.
Rapid stroke care can reduce brain damage
Prevention is not only about avoiding the stroke itself. Timely reperfusion treatment, blood-pressure management and specialist stroke care can limit the amount of brain tissue injured.
Less structural damage may also mean lower later seizure risk, although the relationship depends on stroke type, location and severity.
Access to acute stroke care is therefore relevant to long-term neurological outcomes.
Not every febrile seizure leads to epilepsy
Febrile seizures are common in young children and most do not lead to epilepsy. Complex or prolonged febrile seizures can be associated with increased later epilepsy risk in some children, but the relationship is not simple.
WHO guidance historically included fever management among prevention strategies, although modern clinical guidance does not support routine antipyretics as a reliable way to prevent febrile seizure recurrence.
This distinction matters: treating a sick, uncomfortable child is appropriate, but fever reduction should not be presented as a guaranteed epilepsy-prevention method.
Acute symptomatic seizures are not the same as epilepsy
Seizures can occur during infection, metabolic disturbance, acute stroke, head injury or toxic exposure without the person necessarily developing epilepsy.
Epilepsy refers to an enduring predisposition to recurrent unprovoked seizures. Some acute brain insults resolve without chronic epilepsy, while others initiate long-term epileptogenic change.
Prevention therefore aims to stop or reduce the brain injury that can create that enduring predisposition.
Epileptogenesis can take time
After stroke, trauma or infection, epilepsy may not appear immediately. Months or years can pass between the original brain insult and the first unprovoked seizure.
During this latent period, structural and network changes can develop — a process known as epileptogenesis.
This delay can make the original preventable cause less obvious when epilepsy is finally diagnosed.
Why one injured brain develops epilepsy and another does not
Not everyone with the same type of injury develops epilepsy. Risk is influenced by lesion location, injury severity, age, genetics, inflammation, network organisation and many factors that are still being studied.
This uncertainty does not weaken the case for prevention. Preventing the injury removes the risk pathway entirely, even if only a proportion of exposed people would have developed epilepsy.
The biology of this process is covered separately on Why One Brain Injury Causes Epilepsy and Another Does Not and Epileptogenesis: How a Brain Can Become Epileptic.
Poverty can increase exposure to preventable causes
Poverty is associated with many upstream risks: unsafe roads, limited sanitation, overcrowding, poor access to obstetric care, delayed treatment of infection and higher exposure to some forms of trauma.
It can therefore increase epilepsy risk before diagnosis ever occurs.
This helps explain why the global epilepsy burden cannot be understood purely as a neurological problem.
Rural populations may face compounded risk
People in remote areas may have higher exposure to agricultural injury, endemic infection or unsafe transport while simultaneously having less access to emergency obstetric care, trauma services and infection treatment.
The same geography that raises risk can also delay treatment after the brain injury occurs.
Global prevention therefore needs geographically distributed services, not just national policy.
Climate and environmental change can alter risk indirectly
Climate change can influence infectious-disease distribution, extreme weather, food security and population displacement. These pathways may alter exposure to some causes of neurological injury.
The evidence linking climate change directly to epilepsy incidence is still developing and should not be overstated.
However, climate-sensitive infections, disaster-related injury and disrupted maternal care are plausible pathways through which neurological risk can shift.
Occupational safety belongs in the prevention conversation
Construction, mining, transport, agriculture and industrial work can expose people to falls, head injury and toxic hazards.
Workplace regulation, protective equipment and enforcement reduce traumatic brain injury and therefore some risk of post-traumatic epilepsy.
Prevention is strongest when safety is designed into systems rather than left solely to individual workers.
Alcohol contributes mainly through indirect pathways
Alcohol misuse can increase risk of head injury, road traffic crashes and stroke. Severe withdrawal can also provoke seizures, although withdrawal seizures themselves are not automatically epilepsy.
Long-term heavy alcohol use can therefore contribute to epilepsy burden through several mechanisms, particularly trauma and vascular disease.
Public-health alcohol measures may consequently have neurological benefits beyond addiction treatment.
Toxic exposures can cause seizures without causing chronic epilepsy
Pesticides, carbon monoxide, heavy metals and other toxic exposures can provoke acute seizures. Some severe toxic brain injuries may later be associated with epilepsy, but the evidence varies by toxin and exposure.
Occupational and environmental regulation remains important because preventing neurotoxic injury prevents a broad range of neurological outcomes.
The distinction between acute symptomatic seizure and chronic epilepsy should be maintained.
Childhood injury prevention matters
Safe sleeping environments, child-resistant housing, road safety, supervision around heights and water, and prevention of abuse all reduce risk of severe childhood brain injury.
Many childhood injuries are preventable through environmental design rather than relying on constant perfect supervision.
Again, the epilepsy benefit is one component of a much wider injury-prevention benefit.
Emergency care after brain injury may influence later outcome
Preventing secondary brain injury after trauma — through oxygenation, blood-pressure support, haemorrhage control and neurosurgical care when needed — can reduce neurological damage.
Whether every aspect of acute trauma management directly reduces later epilepsy risk is still being studied, but limiting structural brain injury is biologically and clinically important.
Prevention therefore includes both preventing the accident and providing high-quality care after it happens.
Early infection treatment can reduce neurological damage
For bacterial meningitis and other treatable infections, delayed therapy can increase complications and brain injury.
Access to antibiotics, antiviral treatment where appropriate, diagnostics and intensive care can therefore influence long-term neurological outcomes.
This is especially relevant where travel time and health-system barriers delay presentation.
Sanitation can be a neurological intervention
Safe water, sewage systems, hand hygiene and food safety are usually discussed in relation to gastrointestinal and infectious disease.
But in regions where neurocysticercosis and other infections contribute to epilepsy, sanitation improvements can also reduce neurological disease.
This is one of the clearest examples of epilepsy prevention extending far outside specialist medicine.
Veterinary and agricultural systems can matter too
Taenia solium control requires a One Health approach involving human medicine, veterinary care, pig management, meat inspection and sanitation.
Human epilepsy prevention can therefore depend partly on animal-health systems.
This interconnected approach is especially important in endemic farming communities.
Public-health data determine where prevention resources go
Countries need reliable information about the local causes of epilepsy. If most structural epilepsy in a region follows stroke, cardiovascular prevention may have the greatest effect. If CNS infection and birth injury dominate, the priorities will be different.
However, many regions with the highest epilepsy burden have the weakest diagnostic infrastructure and epidemiological data.
This creates a planning problem: the places that most need targeted prevention may know least about the causes driving their local burden.
Limited MRI can hide preventable causes
When MRI is unavailable, structural causes such as old stroke, perinatal injury or trauma may remain undocumented.
This can lead to more cases being classified as unknown cause and can underestimate the contribution of preventable brain injury.
Global access to neuroimaging therefore affects not only individual diagnosis but also population-level understanding of prevention.
Epilepsy prevention is multisectoral by definition
WHO’s global neurological action plan explicitly frames prevention across health, education, transport, infrastructure, justice, sport and occupational safety.
No neurology department can prevent road traffic crashes, improve sanitation, regulate workplace safety and run maternal-health programmes by itself.
The burden can only be reduced through coordinated public policy.
Primary prevention and treatment are complementary
Prevention does not replace the need to diagnose and treat people who already have epilepsy. Even a successful prevention programme will not eliminate genetic, immune, developmental and unknown causes.
Likewise, treatment programmes do not remove the need to reduce new cases caused by preventable brain injury.
A complete epilepsy strategy needs both.
Preventable does not mean predictable
It is usually impossible to look at one individual with epilepsy and say with certainty that their condition would not have happened if one risk had been removed.
Population-level attributable fractions describe probabilities across groups, not certainty for individuals.
This is why prevention statistics should never be used to assign blame to parents, patients or communities.
What better prevention could change
Reducing preventable epilepsy would mean fewer children living with the consequences of severe birth injury, fewer adults developing epilepsy after head trauma, fewer communities affected by infection-related seizures and fewer older people developing post-stroke epilepsy.
The benefit would extend beyond seizures. The same interventions also reduce death, cognitive disability, cerebral palsy, stroke, infection and traumatic brain injury.
Epilepsy prevention is therefore part of broader brain health.
What this page does — and does not — explain
This page is a global overview of preventable pathways to epilepsy. It does not imply that all epilepsy is preventable, and it does not replace cause-specific clinical guidance. Neurocysticercosis is covered separately because of its major global importance. Post-stroke epilepsy, post-traumatic epilepsy and epilepsy after CNS infection are also covered in the Structural & Acquired Epilepsies section.
Sources
World Health Organization — Epilepsy fact sheet
WHO — IGAP implementation toolkit
WHO/ILAE/IBE — Epilepsy: a public health imperative
ILAE Prevention Task Force — The primary prevention of epilepsy
WHO — Taeniasis/cysticercosis
Evidence checked: September 2026.