Skip to content
knowrare
HealthSignal
Your condition community

Living with Severe myoclonic epilepsy in infancy

A genetic seizure disorder (Dravet syndrome) that starts in infancy and can affect movement, speech and learning.

Understanding Severe myoclonic epilepsy in infancy

Severe myoclonic epilepsy in infancy, also called Dravet syndrome, is the most severe of a group of seizure disorders linked to the SCN1A gene.

Seizures first appear in infancy and are often set off by high temperatures (febrile seizures). In childhood, many types of seizures may occur and may become more frequent. Seizures can be hard to treat. Other symptoms include loss of motor skills, intellectual disability, speech problems and difficulty with movement. Diagnosis is based on an exam, medical history and genetic testing.

Signs & symptoms

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

  • Seizures set off by fever
  • Many types of seizures
  • Sudden muscle jerks (myoclonus)
  • Loss of skills already learned
  • Cognitive impairment
  • Autistic behavior or anxiety

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 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

    Dravet Syndrome Foundation, Inc, FamilieSCN2A and Epilepsy Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Seizure and epilepsy specialists (epileptologist)
Expert care
Expert lists: Dravet Syndrome Foundation, Inc, 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 Dravet Syndrome Foundation, Inc 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
Can SCN1A genetic testing confirm the diagnosis?
Which seizure triggers, such as fever, should we watch for?
What therapies can help with speech and movement?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Dominant

Most cases happen when the SCN1A gene is not working correctly. It can be inherited in an autosomal dominant pattern, but most people with Dravet syndrome have no family history of it.

Also known as: dravet; dravet syndrome; drvt; ds; ds - dravet syndrome; epileptic encephalopathy, early infantile, 6 (dravet syndrome)

Patient organizations

Source: NIH GARD · Severe myoclonic epilepsy in infancyGARD ID 10430 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

Explore research for Severe myoclonic epilepsy in infancy

Explore actively recruiting Severe myoclonic epilepsy in infancy studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Severe myoclonic epilepsy in infancy with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

Powered by HealthSpark, our AI chat helper

I can help you find recruiting Severe myoclonic epilepsy in infancy studies. Enter a ZIP code, address or city below and I'll look within 50 miles.

Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

Get Signals for Severe myoclonic epilepsy in infancy

Stay in the loop with community stories and updates from medical researchers.

HealthStoryfor Severe myoclonic epilepsy in infancy

Create a living journal that talks back

HealthStory evolves private journaling with a living AI journal that talks back and asks thoughtful questions, helping you capture your Severe myoclonic epilepsy in infancy experiences more deeply and prepare for better conversations with your doctors and care team.

Start your journal

Your journal is private. Sharing your story publicly is a separate choice, made with Share your story above.