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Living with New-onset refractory status epilepticus

A rare, serious brain condition in which a person with no seizure history has long-lasting seizures with no clear cause.

Understanding New-onset refractory status epilepticus

New-onset refractory status epilepticus (NORSE) is when a person with no history of seizures has prolonged seizures without a clear cause.

Status epilepticus means one long seizure, or a cluster of seizures with no recovery in between. In NORSE it can last days, weeks, or months and may lead to a coma. Symptoms often start with a mild fever and feeling unwell. A cause is found in about half of people. Common causes include autoimmune disorders and viral brain infection (encephalitis).

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Repeated seizures without recovery (status epilepticus)
  • Fever
  • Problems with thinking (cognitive impairment)
  • Seizures that start in one area of the brain
  • Facial tics and abnormal head movements
  • Seizures that follow a fever-causing infection

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include brain and nervous system specialists, genetic specialists and seizure and epilepsy specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    FamilieSCN2A and Epilepsy Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists); Seizure and epilepsy specialists (epileptologist)
Expert care
Expert lists: FamilieSCN2A, Epilepsy Foundation
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with FamilieSCN2A and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
What tests are being done to look for the cause of the seizures?
Could this be febrile infection-related epilepsy syndrome (FIRES)?
Would genetic testing for genes like SCN2A or IL1RN be useful?

Quick facts

Symptoms usually startAdult

A likely cause is found in about half of people, often an autoimmune disorder or viral encephalitis. Changes in genes such as SCN2A and IL1RN may raise the risk. When no cause is found, it is called cryptogenic NORSE.

GeneticNeurological

Also known as: norse; norse - new-onset refractory status epilepticus

Patient organizations

Source: NIH GARD · New-onset refractory status epilepticusGARD ID 12244 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with New-onset refractory status epilepticus.

Explore the New-onset refractory status epilepticus blog

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Explore actively recruiting New-onset refractory status epilepticus studies with HealthSpark.

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  • Eligibility is confirmed by the study team

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