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Published on: 7/21/2026

What might cause seizures in someone with no prior history?

Yoshinori Abe

Reviewed by Yoshinori Abe, MD

Internal Medicine

Seizures in adults with no prior history can result from several conditions, including late-onset epilepsy, absence status epilepsy, or status epilepticus. Other potential causes include stroke, brain injury, infections such as meningitis, brain tumors, low blood sugar, electrolyte imbalances, alcohol or drug withdrawal, and certain medications. Identifying the underlying cause is essential, as treatment and prognosis vary significantly depending on the trigger.

Because a first-time seizure can signal a serious underlying condition, it's important to act quickly and gather clarity about your symptoms. A free, instant, online symptom check can help you understand possible causes, assess urgency, and guide your next steps—whether that means seeing a neurologist, visiting urgent care, or preparing questions for your doctor. Taking a few minutes now could make a meaningful difference in getting the right care sooner.

Reviewed for medical accuracy: 07/20/2026

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Important Next Steps

Discover causes of seizures with no historyLearn if your seizures need urgent careFind out if seizures could mean epilepsySee OTC options for seizure-related symptomsFind a neurologist for seizure evaluationUnderstand home remedies for seizure recoveryCheck likely causes of your seizures today

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Explanation

Seizures can occur in individuals with no prior history due to several reasons. One potential cause is late-onset epilepsy, which can happen in adults and may be due to underlying health conditions or changes in the brain.

Additionally, absence status epilepsy is another condition where a person might experience seizures characterized by brief lapses in awareness. This condition can occur without a prior history of seizures.

Status epilepticus is a serious condition where seizures last very long or occur close together without recovery in between. This can happen suddenly and requires prompt medical attention.

These conditions highlight the importance of seeking medical evaluation if someone experiences a seizure for the first time. If you're experiencing concerning symptoms, you can check your symptoms with Ubie's free AI-powered tool to better understand what might be happening.

(References)

  • Thomas P. (1999). Absence status epilepsy. Revue neurologique, 10637922.

  • Dam AM, Fuglsang-Frederiksen A, Svarre-Olsen U, & Dam M. (1985). Late-onset epilepsy: etiologies, types of seizure, and value .... Epilepsia, 4006882.

  • Nair PP, Kalita J, & Misra UK. (2011). Status epilepticus: why, what, and how. Journal of postgraduate medicine, 21941070.

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