How is an epileptic seizure diagnosed?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Epileptic seizures are diagnosed using a combination of methods: a detailed medical history, a physical and neurological exam, an electroencephalogram (EEG) to detect abnormal brain activity, and brain imaging such as MRI or CT scans to identify potential underlying causes. Blood tests may also be used to rule out infections or metabolic issues.

If you're experiencing unexplained symptoms like blackouts, twitching, or confusion, getting clarity quickly matters. Take a free, instant, online symptom check to better understand what may be causing your symptoms and receive guidance on the right next steps—no appointment or sign-up required.

Reviewed for medical accuracy: 07/20/2026

Important Next Steps

Discover causes of your seizure symptoms Learn if your symptoms need urgent care Find out if it could be epilepsy See OTC options for seizure recovery support Find a neurologist for seizure evaluation Explore safe home care after seizures Understand if seizure symptoms need medical attention

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Explanation

Diagnosing epilepsy involves several steps:

Medical history: Doctors ask about the seizure's onset, duration, symptoms, and any triggers. They also inquire about family history and past medical conditions. Physical and neurological exam: To assess overall health and brain function. Electroencephalogram (EEG): A test that records the brain's electrical activity to detect abnormal patterns typical of seizures. Imaging studies: MRI or CT scans help identify structural brain issues like tumors, stroke, or malformations. Blood tests: To check for infections, electrolyte imbalances, or other conditions that might cause seizures.

If you're experiencing concerning symptoms and want to better understand what might be happening before your medical appointment, you can use Ubie's free AI-powered symptom checker to get personalized insights based on your specific symptoms.

Accurate diagnosis is important to guide effective treatment and management.

(References)

Anwar H, Khan QU, Nadeem N, Pervaiz I, Ali M, & Cheema FF. (2020). Epileptic seizures. Discoveries (Craiova, Romania), 32577498.
Beghi E, De Maria G, Gobbi G, & Veneselli E. (2006). Diagnosis and treatment of the first epileptic seizure. Epilepsia, 17239098.
Devinsky O, Gazzola D, & LaFrance WC Jr. (2011). Differentiating between nonepileptic and epileptic seizures. Nature reviews. Neurology, 21386814.

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