Seizures occur when there are sudden, uncontrolled bursts of electrical activity in the brain. The reason why this occurs is not known in the majority of patients, but in some patients, seizures occur because of damage to the brain, for example after a head injury, brain tumour, stroke, poisoning or infection.
In some people with epilepsy, certain factors can increase the risk of having a seizure. These are known as 'triggers' and include:
- Lack of sleep
- Stress
- Flashing lights
- Loud noises
- Drinking alcohol