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Healthy people may have seizures under certain circumstances. If the seizures have a known cause, the condition is referred to as secondary or symptomatic epilepsy. Some of the more common causes include the following:

• Tumor
  
  
• Chemical imbalance such as low blood sugar or sodium
  
  
• Head injuries
  
  
• Certain toxic chemicals or drugs of abuse
  
  
• Alcohol withdrawal
  
  
• Stroke including hemorrhage
  
  
• Birth injuries

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