The cause of epilepsy varies between individuals. For some individuals, there is no identifiable cause, whereas others may be due to structural brain changes or changes to channels that regulate the firing of neurons in the brain. Damage to the brain can cause the condition to develop, common causes include:
Stroke
Brain tumour
Severe head injury
Drug or alcohol abuse/misuse
In infection in the brain
Oxygen starvation at birth
For others, it may be genetic.