What does a fever following a seizure indicate?

Reviewed by Yoshinori Abe, MD

Internal Medicine

A fever after a seizure is possible but uncommon. Post-seizure fever, sometimes called postictal fever, may be linked to the type of seizure, prolonged seizure activity, or an underlying infection that triggered the episode in the first place.

Because fever and seizures can share many potential causes — from infections to neurological conditions — it's important not to guess. Understanding the "why" behind your symptoms is the first step toward getting the right care. Take a free, instant, online symptom check to explore possible causes and confidently plan your next steps.

Reviewed for medical accuracy: 07/20/2026

Important Next Steps

Learn if fever after seizure needs urgent care Discover likely causes of fever following seizure Find out if fever and seizure are serious See OTC options for fever symptoms Find a doctor for fever or seizures Understand home remedies for fever after seizure Check if seizure with fever needs care

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Explanation

After a seizure, some people might experience a fever, though this is not very common. Fever following a seizure can be linked to different factors.

Natural History: One study suggests that fever after a seizure can happen, but it doesn't always mean there is an infection or another serious problem.
Type of Seizure: Another study found that post-ictal fever, which means fever after a seizure, is rare and may be more likely with certain types of partial seizures.
Temperature Changes: A more recent study looked at how body temperature changes after a seizure. They found that some people have temperature changes, including fever, shortly after a seizure.

In summary, while fever can happen after a seizure, it is not always a cause for concern. It may depend on the seizure type and individual factors. If you're experiencing symptoms after a seizure and want to better understand what might be happening, you can use our free AI symptom checker to get personalized insights. Always consult a healthcare professional for any concerns after a seizure.

(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.
Muayqil TA, Aljafen BN, Alsalem MF, Alzahrani FS, Barry MA, & Alanazy MH. (2022). Early postictal temperature changes in patients presenting .... Epilepsy research, 35272211.

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