Epilepsy is caused by electrical disturbances in the brain that cause seizures. It is common in young children and older adults and occurs more often in males. Seizures can be triggered by factors like infections, head injuries, genetic conditions, or drugs/alcohol. Epilepsy is classified based on where seizures originate and if they affect one or both brain hemispheres. Treatment involves medications, surgery, or devices to control seizures, with the goal of improving patients' quality of life.