Epilepsy: causes, seizure types, diagnosis, treatment and living with the condition

Causes and types

Causes range from genetic differences and structural brain injuries to infections, metabolic problems and autoimmune conditions. In many cases no clear cause is found. Clinically, seizures are commonly divided into focal (originating in one part of the brain) and generalized (involving both hemispheres from onset). Specific seizure types include focal aware seizures, focal impaired-awareness seizures, generalized tonic–clonic seizures, absence seizures, myoclonic seizures and atonic (drop) seizures.

Diagnosis and treatment

Diagnosis typically combines a detailed medical history with tests such as electroencephalography (EEG) and brain imaging (MRI or CT). Blood tests can help identify metabolic or infectious contributors. Treatment aims to prevent seizures and minimise side effects. First-line therapy is antiseizure medication chosen to match the seizure type. Other options include epilepsy surgery to remove or disconnect a seizure focus, neurostimulation (vagus nerve stimulation, deep brain stimulation or responsive neurostimulation), dietary therapy (for example, ketogenic diets in selected cases) and carefully supervised withdrawal of medication for people in long-term remission.

Living with epilepsy and first aid

Many people with epilepsy lead full lives but may face challenges with driving restrictions, education, employment and social stigma. Support networks, clear safety plans and education for families and workplaces improve outcomes. Basic seizure first aid guidance includes:

• Protect the person from injury and cushion the head.
• Do not restrain movements or place anything in the mouth.
• If breathing is impaired, gently roll the person onto their side once convulsions stop.
• Time the seizure; call emergency services if a convulsive seizure lasts more than five minutes, if breathing stops, or if multiple seizures occur without recovery.

For practical advice and local support see first aid and safety.

History, prognosis and notable facts

Epilepsy has been observed since antiquity and has often been associated with stigma. Scientific understanding improved with advances such as the development of the EEG in the early 20th century and modern brain imaging. While many people become seizure-free with appropriate treatment, uncontrolled seizures increase the risk of injury and of sudden unexpected death in epilepsy (SUDEP). Ongoing research and patient advocacy continue to expand treatment options and social support. For reliable background material and further reading see medical resources, seizure type guides and diagnosis and treatment options.