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Published on: 7/21/2026

Is it possible for seizures to cause a fever?

Yoshinori Abe

Reviewed by Yoshinori Abe, MD

Internal Medicine

Seizures can sometimes cause a fever, though this is uncommon. A post-seizure fever, known as postictal hyperthermia, is most often associated with prolonged or complex partial seizures. It typically results from intense muscle activity, autonomic nervous system changes, or underlying inflammation triggered by the seizure itself.

However, fever and seizures can also occur in the reverse order—a fever may trigger a seizure, particularly in young children (febrile seizures). Because the relationship between fever and seizures can signal different underlying conditions, it's important to understand what may be causing your symptoms.

If you or a loved one has experienced a seizure with fever, take a free, instant, online symptom check to better understand what may be happening and get personalized guidance on next steps. It takes just a few minutes and can help you decide whether to seek urgent care, schedule a doctor's visit, or monitor at home—empowering you with clarity when you need it most.

Reviewed for medical accuracy: 07/20/2026

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Important Next Steps

Learn what’s causing fever-related seizuresSee if fever-triggered seizures need careDiscover if seizures with fever are dangerousFind OTC options for fever symptomsFind a doctor for seizure evaluationLearn home remedies for fever managementFind out if seizures need urgent care

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Explanation

Seizures can sometimes lead to a fever, but this is not a common occurrence and not typically expected. However, there are instances where this can happen.

  • Post-Ictal Fever: After a seizure, some people may experience a fever. This is called a post-ictal fever and is considered rare, especially in partial seizures.
  • Complex Partial Seizures: In some cases, complex partial seizures can present with fever. This is not a usual symptom, but it has been documented.

In summary, while it is possible for a seizure to cause a fever, it doesn't happen often. If you're experiencing unusual symptoms like fever following a seizure, you can use a free AI symptom checker to help understand what might be happening and determine if you need medical attention.

(References)

  • Wachtel TJ, Steele GH, & Day JA. (1987). Natural history of fever following seizure. Archives of internal medicine, 3592881.

  • Rossetti AO, Tosi C, Despland PA, & Staedler C. (2007). Post-ictal fever: a rare symptom of partial seizures. European journal of neurology, 17437623.

  • Semel JD. (1987). Complex partial status epilepticus presenting as fever .... Archives of internal medicine, 3632165.

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