Can febrile seizures occur without a fever?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Febrile seizures, by definition, only occur when a fever is present. They cannot happen without a fever. If a seizure occurs without an elevated body temperature, it is classified as a different type of seizure and may require separate medical evaluation.

Key facts about febrile seizures:

They are triggered by fever, typically above 100.4°F (38°C)
They most commonly affect children between 6 months and 5 years old
A seizure without fever is not considered a febrile seizure

If you or your child has experienced a seizure — with or without fever — understanding the cause is critical to getting the right care. Symptoms can overlap across many conditions, and identifying the underlying trigger early can guide you toward faster, more effective treatment. Take a free, instant, online symptom check to better understand what may be happening and confidently navigate your next steps.

Reviewed for medical accuracy: 07/20/2026

Important Next Steps

Learn if seizures need urgent care Discover likely causes of seizure episodes See if it could be febrile seizures Find OTC options for seizure symptoms Find a specialist for seizure evaluation Discover safe home care after seizures Understand if recurrent seizures need evaluation

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Explanation

Febrile seizures are a type of seizure that occurs in young children when they have a fever. These seizures specifically occur in the presence of a fever, which means they cannot occur without one.

Key Points:

What are Febrile Seizures?: These are seizures that occur when a child has a fever, often due to an infection.
Age Group: They are most common in children between 6 months and 5 years old.
Presence of Fever: A fever is necessary for a seizure to be classified as a febrile seizure. Without a fever, the seizure would be due to another cause.

Understanding febrile seizures can help parents and caregivers manage them better. If your child is experiencing fever-related symptoms or you're concerned about their health, use Ubie's free AI-powered symptom checker to get personalized insights, and always consult a healthcare provider if a seizure occurs.

(References)

Smith DK, Sadler KP, & Benedum M. (2019). Febrile Seizures: Risks, Evaluation, and Prognosis. American family physician, 30932454.
Patterson JL, Carapetian SA, Hageman JR, & Kelley KR. (2013). Febrile seizures. Pediatric annals, 24295158.
Cerisola A, Chaibún E, Rosas M, & Cibils L. (2018). [Febrile seizures: questions and answers]. Medicina, 30199360.

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