In some 6 out of 10 cases, epilepsy is idiopathic — meaning the cause is unknown. In other cases, epilepsy can be traced to an abnormality of the structure or function of the brain.
These abnormalities can arise from traumatic brain injuries, strokes and other vascular problems, infections of the nervous system (meningitis or encephalitis), congenital malformations, brain tumors or metabolic abnormalities.
Seizures can literally begin at any time for any number of reasons.
Here are just a few of them.
Which pertain to you?