Huntington's Disease: Symptoms, Causes & Treatment Guide
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: September 2026
Huntington's disease is a rare, inherited brain disorder that causes nerve cells to decay over time, affecting movement, thinking, and mental health. It follows an autosomal dominant pattern: each child of an affected parent has a 50% chance of inheriting the gene change. Symptoms usually begin in the 30s or 40s and fall into three groups — movement disorders (especially chorea, the involuntary jerking or writhing), cognitive problems, and mental health conditions. No treatment stops the disease, but medicines and therapy can manage symptoms. If you notice changes in movements, mood, or mental ability — especially with a family history — see a healthcare professional promptly.
Quick Answer
What is Huntington's disease?
A rare, inherited brain disorder in which nerve cells decay over time, affecting movement, thinking, and mental health.
Passed down through a single changed gene (autosomal dominant): each child of an affected parent has a 50% chance of inheriting it.
Symptoms often begin in the 30s or 40s; when it develops before age 20, it is called juvenile Huntington's disease.
Three symptom groups: movement disorders (chorea, rigidity, balance and swallowing trouble), cognitive problems (focus, flexibility, impulse control), and mental health conditions (depression is most common).
No treatment alters the course of the disease — medicines lessen symptoms, and therapies help people adapt.
Genetic testing can confirm the diagnosis — always done with a genetic counselor, including predictive testing before symptoms appear.
When to see a doctor: notice changes in movements, mood, or mental ability. Many other conditions cause similar symptoms, so early, thorough diagnosis matters.
What Is Huntington's Disease?
Huntington's disease causes nerve cells in the brain to decay over time. The disease affects a person's movements, thinking ability, and mental health.
It is a rare disease, most often passed down through a changed gene from a parent. Symptoms can develop at any time, but they usually begin when people are in their 30s or 40s.
Medicines are available to help manage symptoms. However, treatments cannot prevent the physical, mental, and behavioral decline caused by the disease.
How Is It Inherited?
Huntington's disease follows an autosomal dominant inheritance pattern. This means a person needs only one copy of the nontypical gene to develop the disorder.
Everyone inherits two copies of every gene (except genes on the sex chromosomes) — one from each parent. A parent with the nontypical gene can pass along either the nontypical copy or the healthy copy. Each child therefore has a 50% chance of inheriting the gene change.
Feature | What it means |
Inheritance pattern | Autosomal dominant — one changed gene copy is enough |
Chance per child | 50% if one parent carries the gene change |
Typical onset | 30s or 40s, though it can begin at any age |
Juvenile form | Develops before age 20; symptoms differ and progress may be faster |
Curable? | No — treatments manage symptoms but cannot stop the decline |
What Are the Symptoms of Huntington's Disease?
Huntington's disease usually causes movement disorders. It also causes mental health conditions and trouble with thinking and planning. Together, these create a wide spectrum of symptoms.
First symptoms vary greatly from person to person. Some symptoms have a greater effect on daily function, and severity can change throughout the course of the disease.
Movement Disorders
The disease causes movements that cannot be controlled, called chorea — involuntary movements affecting the muscles of the whole body, specifically the arms and legs, the face, and the tongue. Symptoms include:
Involuntary jerking or writhing movements
Muscle rigidity or muscle contracture
Slow or unusual eye movements
Trouble walking or keeping posture and balance
Trouble with speech or swallowing
People with the disease may also lose control over voluntary movements. This can affect daily function more than the involuntary movements — impacting the ability to work, perform daily activities, communicate, and remain independent.
Cognitive Conditions
Thinking problems often include:
Trouble organizing, prioritizing, or focusing on tasks
Lack of flexibility — getting stuck on a thought, behavior, or action (called perseveration)
Lack of impulse control — outbursts, acting without thinking, sexual promiscuity
Lack of awareness of one's own behaviors and abilities
Slowness in processing thoughts or "finding" words
Trouble learning new information
Mental Health Conditions
The most common mental health condition is depression — and it is not simply a reaction to the diagnosis. It appears to occur because of damage to the brain and changes in brain function.
Depression symptoms include irritability, sadness, or apathy; social withdrawal; trouble sleeping; fatigue and loss of energy; and thoughts of death, dying, or suicide.
Other common conditions include obsessive-compulsive disorder (OCD) (intrusive recurring thoughts and repeated behaviors), mania (elevated mood, overactivity, impulsive behavior, inflated self-esteem), and bipolar disorder (alternating depression and mania). Weight loss is also common, especially as the disease worsens.
Juvenile Huntington's Disease
In younger people, the disease begins and progresses slightly differently. Early symptoms include:
Category | Juvenile symptoms |
Behavioral | Trouble paying attention; sudden drop in school performance; aggressive or disruptive behavior |
Physical | Contracted, rigid muscles affecting walking (especially young children); tremors; frequent falls or clumsiness; seizures |
When Should You See a Doctor?
See a healthcare professional if you notice changes in your movements, emotional state, or mental ability.
The same symptoms can be caused by a number of different conditions. That is exactly why a prompt and thorough diagnosis matters — it rules other causes in or out and gets support started early.
What Causes Huntington's Disease?
Huntington's disease is caused by a difference in a single gene passed down from a parent. Only one changed gene is needed to develop the disorder (autosomal dominant inheritance).
There is no lifestyle cause — the disease is genetic. The only known risk factor is family history.
Risk Factors
Risk factor | Detail |
Parent with Huntington's disease | Each child has a 50% chance of having the gene change |
Family history without symptoms | Predictive genetic testing is an option, with genetic counseling |
What Are the Complications of Huntington's Disease?
After the disease starts, a person's ability to function gradually worsens. How quickly varies.
The time from first symptoms to death is often about 10 to 30 years. Juvenile Huntington's disease usually results in death within 10 to 15 years after symptoms develop.
Depression increases the risk of suicide. Research suggests the suicide risk is greatest before a diagnosis and when a person loses independence — a critical window for support.
Eventually, a person needs help with all daily activities. Late in the disease, the person will likely be confined to a bed and unable to speak. Notably, people generally can still understand language and often retain awareness of family and friends, though some will not recognize family members.
Common causes of death include pneumonia or other infections, injuries related to falls, and complications related to trouble swallowing.
Can Huntington's Disease Be Prevented?
There is no way to prevent the disease itself. But people with a family history who worry about passing the gene to their children have real options:
Option | How it works |
Genetic testing | Confirms whether you carry the gene change; done only after consultation with a genetic counselor |
Prenatal testing | Tests a pregnancy for the Huntington gene |
IVF with donor sperm or eggs | Removes the family gene from the picture entirely |
IVF with preimplantation genetic diagnosis | Embryos are fertilized in a lab and tested; only embryos without the Huntington gene are implanted |
A genetic counselor explains the potential risks of a positive result — including that it may mean the parent develops the disease — and helps couples weigh these choices.
How Is Huntington's Disease Diagnosed?
A preliminary diagnosis is based on your answers to questions, a general physical exam, and your family medical history. Neurological testing and a mental health evaluation follow.
Neurological Exam
Domain | What is checked |
Motor symptoms | Reflexes, muscle strength, balance |
Sensory symptoms | Touch, vision, hearing |
Psychiatric symptoms | Mood and mental status |
Neuropsychological Testing
Standardized tests check memory, reasoning, mental agility, language skills, and spatial reasoning. Licensed psychologists may perform more thorough testing if needed.
Mental Health Evaluation
You may be referred to a psychiatrist, who looks for contributing factors including emotional state, behavior patterns, quality of judgment, coping skills, signs of disordered thinking, and evidence of substance abuse.
Brain Imaging
MRI or CT scans provide detailed images of the brain's structure and function. They may reveal changes in areas affected by the disease — though changes may not show up early. Imaging also helps rule out other conditions causing the symptoms.
Genetic Counseling and Testing
If symptoms strongly suggest Huntington's disease, the care team may recommend a genetic test for the nontypical gene. The test can confirm the diagnosis, and helps when there is no known family history or no family member's diagnosis was genetically confirmed. It does not, however, determine the treatment plan.
Before testing, a genetic counselor explains the benefits and drawbacks of learning the results and answers questions about inheritance patterns.
Predictive Genetic Testing
A genetic test is also available for people with a family history but no symptoms. It cannot predict when the disease will begin or which symptoms appear first. Some people choose it because not knowing is more stressful; others before having children.
Risks include possible effects on insurability or future employment and the stress of facing a fatal disease. In principle, federal laws make it illegal to use genetic information to discriminate against people with genetic diseases. These tests are only performed after consultation with a genetic counselor.
What Are the Treatment Options for Huntington's Disease?
No treatments can alter the course of the disease. But medicines can lessen some movement and mental health symptoms, and multiple interventions help a person adapt to changing abilities for a time.
Medicines may change over the course of the disease. Notably, medicines that treat some symptoms may cause side effects that worsen others — so treatment goals are reviewed and updated regularly.
Medicines for Movement Disorders
Medicine type | Examples | How they help | Key side effects |
Movement-control medicines | Tetrabenazine, deutetrabenazine, valbenazine | FDA-approved to suppress chorea; do not affect disease progression | Drowsiness, restlessness; risk of worsening or triggering depression |
Antipsychotic medicines | Haloperidol, fluphenazine, olanzapine, aripiprazole | Suppress movements as a side effect, helping chorea | May worsen dystonia; Parkinson's-like slowness; restlessness; drowsiness |
Other chorea medicines | Amantadine, levetiracetam, clonazepam | May help suppress chorea | Mild effectiveness and side effects may limit use |
Medicines for Mental Health Conditions
Medicine type | Examples | How they help | Key side effects |
Antidepressants | Citalopram, escitalopram, fluoxetine, sertraline | Treat depression; may also help OCD symptoms | Nausea, diarrhea, drowsiness, low blood pressure |
Antipsychotics | Quetiapine, olanzapine | Suppress violent outbursts, agitation, and other symptoms | May cause movement disorders themselves |
Mood stabilizers | Divalproex, carbamazepine, lamotrigine | Prevent the highs and lows of bipolar disorder | — |
Therapies That Help People Adapt
Psychotherapy. A psychiatrist, psychologist, or clinical social worker provides talk therapy for behavioral symptoms, helps develop coping strategies, manages expectations as the disease progresses, and improves family communication.
Speech therapy. The disease affects the muscles of the mouth and throat that are essential for speech, eating, and swallowing. A speech therapist helps with clear speech, communication devices, and eating and swallowing difficulties.
Physical therapy. A physical therapist teaches safe exercises that build strength, flexibility, balance, and coordination — maintaining mobility as long as possible and reducing fall risk.
Occupational therapy. An occupational therapist helps with assistive devices: handrails at home, bathing and dressing aids, and utensils adapted for limited fine motor skills.
Living With Huntington's Disease: Everyday Strategies
Eating and Nutrition
Two challenges dominate. First, trouble maintaining a healthy body weight — caused by trouble eating or by needing more calories due to physical exertion or a metabolic condition. More than three meals a day or dietary supplements may be needed.
Second, trouble with chewing, swallowing, and fine motor skills limits food intake and increases choking risk. Helpful steps include removing distractions during meals, choosing easier-to-eat foods, using adapted utensils, and using covered cups with straws or spouts. Eventually, a person will need help with eating and drinking.
Managing Cognitive and Mental Health at Home
Family and caregivers can create an environment that helps avoid stress triggers:
Use calendars and schedules to keep a regular routine
Start tasks with reminders or assistance
Organize work and activities by importance
Break tasks into manageable steps
Keep the environment calm, simple, and structured
Steer away from stressors that trigger outbursts, irritability, or depression
For school-age children and teens, work with school staff on an individual education plan
Support social interactions and friendships as much as possible
Preparing for Your Appointment
Before the visit, make a list that includes symptoms or changes from your usual, recent changes or stresses, all medicines (including over-the-counter and supplements, with doses), and family history of Huntington's disease or other conditions that cause movement or mental health problems. Consider bringing a family member or friend for support and perspective on how symptoms affect daily function.
Conclusion: Early Diagnosis Opens Every Door
Huntington's disease is a rare, inherited disorder in which nerve cells in the brain decay over time, affecting movement, thinking, and mental health. It is passed down through a single changed gene — each child of an affected parent has a 50% chance of inheriting it. Symptoms usually begin in the 30s or 40s, most commonly as involuntary movements (chorea), and depression — caused by the disease itself, not just the diagnosis — deserves particular attention.
The honest truth: no treatment alters the course of the disease. But that is not the whole story. Medicines can meaningfully reduce movement and mood symptoms, and speech, physical, and occupational therapies help people stay independent longer. Genetic counseling and testing — including predictive testing before symptoms appear — give families real planning options. And because many other conditions cause similar symptoms, the single most valuable step is an early, thorough diagnosis.
If you have noticed changes in movements, mood, or mental ability — or carry a family history of Huntington's disease — talk to a healthcare professional.
Frequently Asked Questions
What is Huntington's disease?
Huntington's disease is a rare, inherited brain disorder in which nerve cells decay over time, affecting movements, thinking ability, and mental health. It is caused by a difference in a single gene passed down from a parent.
Is Huntington's disease genetic?
Yes. It follows an autosomal dominant inheritance pattern — only one copy of the changed gene is needed to develop the disease. Each child of a parent with the gene change has a 50% chance of inheriting it.
What are the first signs of Huntington's disease?
First symptoms vary widely, but commonly include involuntary jerking or writhing movements (chorea), mood changes such as irritability or depression, and trouble organizing or focusing. Symptoms often begin in a person's 30s or 40s.
Can you test for Huntington's disease before symptoms start?
Yes. Predictive genetic testing is available for people with a family history but no symptoms, though it cannot predict when the disease will begin or which symptoms appear first. It is only done after consultation with a genetic counselor.
What is chorea in Huntington's disease?
Chorea is the hallmark involuntary movement of the disease — uncontrollable jerking or writhing affecting muscles throughout the body, especially the arms, legs, face, and tongue. Several FDA-approved medicines can suppress chorea.
Is there a cure for Huntington's disease?
No. No treatments can alter the course of the disease. Medicines can lessen movement and mental health symptoms, and therapies help people adapt to changes in abilities over time.
How does Huntington's disease affect mental health?
Depression is the most common mental health condition — and it stems from damage to the brain, not merely from the reaction to a diagnosis. OCD, mania, and bipolar disorder are also common, and depression raises suicide risk, particularly before diagnosis and when independence is lost.
What is juvenile Huntington's disease?
When the disease develops before age 20, it is called juvenile Huntington's disease. Early symptoms often include a sudden drop in school performance, rigid muscles, tremors, frequent falls, and seizures, and the disease tends to progress faster.
References
Huntington's disease — Symptoms & causes (medically expert-reviewed content dated April 25, 2024)
Huntington's disease — Diagnosis & treatment (medically expert-reviewed content dated April 25, 2024)
This article is for general information only and is not a substitute for professional medical advice. Seek care from a qualified healthcare professional for diagnosis and treatment decisions.
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