Can Epilepsy Be Genetic? Understanding the Facts Clearly

June 5, 2026

Epilepsy is one of the most common neurological disorders and affects over 50 million people worldwide. However, there is a lack of widespread understanding regarding the complexities of the disorder and its causes. One of the most critical, but often overlooked, aspects is the role of genetics. As science progresses, there is a growing understanding of the importance of genetics in the disorder.

What Is Epilepsy, and How Common Is It?

In layman’s terms, epilepsy is a brain disorder characterised by multiple seizures. Seizures are caused by the sudden, abnormal outburst of electrical impulses in the brain. Seizures vary greatly by individuals. Some people may shake violently, while others may stare blankly and remain nonresponsive for a short period of time.

The World Health Organization estimates that there are 50 million individuals worldwide who are epileptic, with the largest estimates out of India, at 12 million people- roughly 10-12% of the globe. Epilepsy is widespread and affects millions of people, yet there is still a significant stigma that accompanies the disorder, and more generally, neurological disorders.

What causes epilepsy? There are a wide variety of triggers that vary in scope, from infections to tumors to brain injuries. However, recent scientific research supports the claim that epilepsy will always have a genetic component.

How Genetics Connects to Epilepsy?

Here’s something that surprises most people: researchers estimate that most cases of epilepsy have a genetic component, although epilepsy does not always run in families. Most people with epilepsy have genetics that predispose them to having seizures.

Consider this scenario: two people get into a car accident that causes a brain injury. Only one of them develops epilepsy. Why is that? Because the person who goes on to have epilepsy had a genetic predisposition that made her brain vulnerable to seizures in conjunction with the injury.

What Is a Seizure Threshold?

Under certain conditions (like extreme sleep deprivation, illness, or specific drugs), anyone can experience a seizure. The brain does tend to defend itself from seizures as a reflex. This is a a seizure threshold where value is determined by genetics.

People with a lower seizure threshold have brains that are more easily triggered into abnormal activity. This is why some people develop epilepsy after a brain injury while most others do not.

Is There a Single “Epilepsy Gene”?

This is a myth which needs to be addressed. There is no one single mutation that can be pointed to as ‘the epilepsy gene’ and through research, there are over 500 mutations that can lead to epilepsy. A single form of epilepsy can be the result of a mutation within a singular gene or several mutations spread across multiple genes.

This variation is exactly why epilepsy is not a singular disease. A number of conditions are categorized as epilepsy.

Common gene-related epilepsies include:

Dravet Syndrome is a form of epilepsy associated with the SCN1A gene
KCNQ2 gene mutation is associated with KCNQ2 epilepsy
CDKL5 gene relapsed mutation causes the CDKL5 deficiency

Does “Genetic” Mean It Was Inherited from Your Parents?

Not always – and this distinction matters.

A condition of genetic origin can occur without direct lineage to one parent or the other. During the process of conception to fetal formation, genes can undergo spontaneous alterations. Such a phenomenon is termed a de novo mutation, evolving outside of the mother or father.

This explains the occurrence of a child with a diagnosis of epilepsy that is of genetic origin, when no other family members have the same condition. Parents often feel baffled or even blame themselves when their child is diagnosed with a genetic form of epilepsy. It is critical to dispel the notion that genetic alterations are a result of someone’s actions.

Will My Child Inherit My Epilepsy?

This is one of the most common questions that parents with epilepsy ask. The reassuring answer, for most families, is that the risk is relatively low.

Here is what the data shows:

The general risk for any child in the population developing epilepsy is about 1 in 100 (1%).
For children of a parent with epilepsy, this risk rises to approximately 2 to 5 in 100 (2–5%).
In certain genetic epilepsy syndromes, the risk can be higher.

The risk varies depending on:

The type of epilepsy the parent has
Whether the epilepsy has an identifiable genetic mutation
The age at which the epilepsy started
Whether the other parent or a sibling also has epilepsy

In other words, most parents with epilepsy do not have children with epilepsy. A neurologist can assess your specific situation and give you a much clearer picture of the risks based on your personal and family history.

What Is Genetic Testing for Epilepsy?

Genetic or genomic testing helps identify changes in genes that may be causing a person’s epilepsy. It usually involves a simple blood or saliva sample, which is then sent to a specialised laboratory for analysis.

Whole Genome Sequencing

One of the most advanced tools available today is whole genome sequencing – a test that examines all your genes at once, focusing on changes that are linked to epilepsy.

The results of this test can help:

Confirm a diagnosis when the cause of epilepsy is unclear
Guide treatment choices – because some anti-seizure medications work better for specific genetic types of epilepsy
Monitor the body for other effects the genetic condition might have
Inform family planning – by identifying whether the condition could be passed to future children

This kind of personalised, genetics-based approach to epilepsy is one of the most exciting developments in modern neurology.

Who Should Consider Genetic Testing?

Genetic testing for epilepsy is not needed for everyone. Based on current medical guidelines, it is particularly recommended when:

Epilepsy starts before two years of age
It is associated with developmental delays or intellectual disability
No clear structural or metabolic cause has been found
Multiple family members are affected

If you or your child falls into any of these categories, a detailed discussion with a neurologist can help you understand whether genetic testing is the right step.

How Does Knowing the Genetic Cause Help?

Understanding the genetic cause of epilepsy is not just about labelling a condition – it can genuinely change how a person is treated.

For example:

Patients with SCN1A mutations (Dravet Syndrome) often respond poorly to sodium channel blockers like carbamazepine. Knowing the mutation early can prevent the use of medications that could actually make seizures worse.
Patients with KCNQ2 mutations may respond well to specific medications, and early identification can lead to better outcomes.
In some genetic epilepsies, dietary therapies like the ketogenic diet have shown notable benefits.

This is the promise of precision medicine – moving away from a one-size-fits-all approach and towards treatment that is tailored to each person’s unique genetic profile.

Lifestyle and Genetics: Can You Reduce Your Risk?

While you cannot change your genes, there are steps that can reduce the risk of seizures in people who are genetically susceptible:

Getting enough sleep – sleep deprivation is one of the most common seizure triggers
Managing stress effectively
Avoiding alcohol and recreational drugs, which can lower the seizure threshold
Taking medications consistently – missing doses is a leading cause of breakthrough seizures
Regular medical follow-up – especially if you have a known genetic predisposition

These steps will not eliminate epilepsy in someone genetically predisposed, but they can make a meaningful difference in day-to-day seizure control.

Breaking the Stigma Around Genetic Epilepsy

One often-overlooked aspect of genetic epilepsy is the emotional burden it places on families – especially parents. Many feel guilt, shame, or fear. A study published in Epilepsy & Behavior found that stigma remains a major challenge for people with epilepsy in India, affecting their social relationships, employment, and mental health.

Understanding that epilepsy is a medical condition – not a curse, not a sign of weakness, and not always preventable – is the first step towards breaking that stigma. Genetics-based diagnoses, while sometimes emotionally difficult to receive, often actually bring relief to families – finally giving a name and an explanation to years of uncertainty.

Conclusion

The relationship between genetics and epilepsy is complex, but it is becoming clearer with every passing year. Knowing the genetic basis of epilepsy can lead to earlier diagnosis, better-suited treatment, and more informed decisions about family planning. Whether you are a patient, a parent, or a caregiver, this knowledge is empowering.

If you or someone you care for has been diagnosed with epilepsy – or if you have concerns about genetic risk – a consultation with a specialist can make all the difference.

Dr. Amit Arora, Consultant Neurologist at Fakeeh University Hospital, brings over 15 years of clinical experience in neurology, with a specialised focus on epilepsy care. He completed a dedicated Clinical Epilepsy Fellowship at AIIMS, New Delhi, and further trained at the Cleveland Clinic Epilepsy Centre in Ohio, USA. Dr. Arora runs dedicated epilepsy clinics and is skilled in advanced diagnostic procedures including EEG, whole-genome-guided workups, and the management of refractory seizures. If you have questions about epilepsy – genetic or otherwise – Dr. Arora’s expertise offers a thoughtful, evidence-based pathway forward.