Design of a human head with a part of the brain highlighted red to signify seizure activity.

Seizures

A seizure is a sudden surge of abnormal electrical activity in the brain that can cause changes in behavior, movement, awareness, or sensations.

Quick Facts

  • Seizures can occur once or repeatedly
  • Not all seizures involve convulsions
  • Epilepsy is a condition characterized by recurrent seizures
  • Seizures can affect people of all ages
  • Proper diagnosis helps guide effective treatment

Symptoms

Seizure symptoms vary depending on the type and part of the brain affected. Symptoms may include:

  • Temporary confusion or loss of awareness
  • Uncontrolled jerking or shaking movements
  • Staring spells
  • Sudden muscle stiffness or limpness
  • Changes in sensation, vision, or hearing
  • Brief loss of consciousness

Causes

Seizures can occur for many reasons and may be triggered by underlying medical conditions or temporary factors. Common causes include:

  • Epilepsy
  • Head injury or trauma
  • Stroke or brain injury
  • Brain infections
  • High fever (especially in children)
  • Metabolic imbalances
  • Withdrawal from alcohol or certain medications

Risk Factors

You may be at higher risk for seizures if you:

  • Have a history of brain injury or stroke
  • Have epilepsy or a family history of seizures
  • Have infections affecting the brain
  • Experience metabolic or electrolyte imbalances
  • Use or withdraw from certain substances

Treatments

Treatment depends on the cause, frequency, and type of seizures. Options may include:

  • Anti-seizure medications
  • Treatment of underlying conditions
  • Lifestyle modifications to reduce triggers
  • Dietary therapy in select cases
  • Surgical or device-based therapies for uncontrolled seizures
  • Ongoing neurological monitoring

When to Seek Care

See a doctor after a first seizure, if seizures recur, worsen, or change in pattern, or if a seizure lasts longer than a few minutes. Seek emergency care for prolonged seizures, repeated seizures without recovery, or injury during a seizure.

Medical Disclaimer: This content is for general educational purposes only and does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your symptoms or health concerns. If you are experiencing a medical emergency, call 911 or seek immediate care
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