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Living with Tay-Sachs disease

An inherited nervous system condition in which nerve cells in the brain and spinal cord are lost, affecting movement and development.

Understanding Tay-Sachs disease

Tay-Sachs disease is a rare inherited condition that causes nervous system problems from the loss of nerve cells in the brain and spinal cord.

The most common form is infantile Tay-Sachs. Babies usually develop typically until 3 to 6 months, then lose skills such as turning over, sitting, and crawling. They have an exaggerated startle reaction to loud noises. Later features include seizures, trouble swallowing, vision and hearing loss, and intellectual disability. A cherry-red spot in the eye is typical. Juvenile and late-onset forms are rare and milder, with muscle weakness, poor coordination, speech problems, and psychiatric symptoms.

Signs & symptoms

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

  • Loss of developmental skills
  • Cherry-red spot in the eye
  • Exaggerated startle to loud noises
  • Muscle weakness and twitches
  • Poor coordination and frequent falls
  • Seizures and trouble swallowing

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, eye disease specialists, genetic specialists and seizure and epilepsy specialists.

  3. Consider genetic testing

    Changes in HEXA are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Epilepsy Foundation and The Foundation for Peripheral Neuropathy may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Eye disease specialists (ophthalmologists); Genetic specialists (geneticists); Seizure and epilepsy specialists (epileptologist)
Expert care
Expert lists: Epilepsy Foundation, The Foundation for Peripheral Neuropathy
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 National Tay-Sachs and Allied Diseases Association 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
Which form of Tay-Sachs applies to my child or me?
What supportive care helps with swallowing and seizures?
Would genetic counseling and carrier testing help our family?

Quick facts

Symptoms usually startany time in life
InheritanceAutosomal Recessive
GenesHEXA

Changes in the HEXA gene cause this condition. It is autosomal recessive, meaning a child inherits a changed copy of the gene from each parent.

GeneticNeurologicalInherited MetabolicLysosomal Storage

Also known as: disease, tay-sachs; gm2 gangliosidosis, b, b1 variant; gm2 gangliosidosis, type 1; gm2-gangliosidosis, several forms; hex a pseudodeficiency; hexa deficiency

Patient organizations

Source: NIH GARD · Tay-Sachs diseaseGARD ID 7737 · 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 Tay-Sachs disease.

Explore the Tay-Sachs disease blog

Explore research for Tay-Sachs disease

Explore actively recruiting Tay-Sachs disease studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Tay-Sachs disease 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

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

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