A seizure happens because of abnormal electrical activity in the brain. It may cause unconsciousness and convulsions, when your body shakes uncontrollably.
Seizures usually come on suddenly. How long and severe they are can vary. A seizure can happen to you just once, or over and over. If they keep coming back, that's epilepsy, or a seizure disorder. Less than one in 10 people who have a seizure get epilepsy.
What Causes Seizures?
Often, it's unknown. Many things can bring them on, including:
- Brain tumors
- Head injuries
- Electrolyte imbalance
- Very low blood sugar
- Repetitive sounds or flashing lights, as in video games
- Some medications, like antipsychotics and some asthma drugs
- Withdrawal from some medications, like Xanax, narcotics, or alcohol
- Use of narcotics, such as cocaine and heroin