Chronic Vocal Tic Disorder
Long-lasting involuntary sounds without motor tics
Quick Facts
- Type: Neurological (movement) condition
- Tic type: Vocal only (no motor tics)
- Usual onset: Childhood, before age 18
- Duration: More than one year
Overview
Chronic vocal tic disorder is a condition in which a person has one or more vocal (sound-producing) tics that last for more than a year. Vocal tics are sudden, repetitive, involuntary sounds, and in this disorder there are no motor tics. The condition usually begins in childhood.
Vocal tics can be as simple as throat clearing, sniffing, or grunting, or more complex, such as repeating words or phrases. Like other tics, they tend to wax and wane in frequency and intensity and can often be briefly suppressed at the cost of a building urge. Many children have mild tics that improve over time, and treatment is usually reserved for tics that interfere with daily life or cause distress.
Symptoms
The defining feature is one or more vocal tics that have persisted for more than a year. These may include:
- Simple vocal tics such as throat clearing, sniffing, grunting, coughing, or humming
- More complex vocal tics such as repeating words, syllables, or phrases
- Sounds that come and go, change over time, and vary in intensity
- An uncomfortable urge before the tic that is relieved by making the sound
- Temporary ability to hold back tics, often followed by a stronger release
By definition, motor tics such as blinking or shoulder shrugging are not part of chronic vocal tic disorder; if both motor and vocal tics are present, the condition is classified differently.
Causes
The exact cause is not fully known, but vocal tic disorders are thought to arise from differences in the brain circuits that control movement and sound production. Contributing factors include:
- Genetics: Tic disorders often run in families.
- Brain chemistry and circuits: Differences in pathways involving the basal ganglia and chemical messengers such as dopamine are believed to contribute.
- Developmental factors: Tics typically appear during childhood brain development.
Vocal tics are involuntary and are not caused by bad behavior or poor parenting. Stress, excitement, and tiredness can temporarily make tics more noticeable.
Risk Factors
- A family history of tics or Tourette syndrome
- Being male, as tic disorders are more common in boys
- Childhood onset, typically before age 18
- Coexisting conditions such as ADHD or obsessive-compulsive features
Diagnosis
There is no single laboratory test; the diagnosis is based on the history and observation. A doctor will:
- Confirm that one or more vocal tics have been present for more than a year
- Confirm the absence of motor tics and that tics began before age 18
- Make sure the sounds are not caused by another medical condition, such as allergies or asthma, or by a medication
- Look for related conditions such as ADHD, anxiety, or obsessive-compulsive symptoms
Tests are sometimes used to rule out other causes of repetitive sounds, but they are not required to make the diagnosis.
Treatment
Many children with mild vocal tics need only reassurance and education, since tics often improve with time. Treatment is considered when tics interfere with daily life, school, or self-esteem.
- Education and reassurance: Understanding that tics are involuntary and often temporary reduces worry.
- Behavioral therapy: Comprehensive Behavioral Intervention for Tics (CBIT) teaches awareness of the urge and a competing response.
- Medication: When tics are severe or distressing, certain medications can reduce them, used selectively because of possible side effects.
- Treating related conditions: Managing coexisting ADHD, anxiety, or obsessive-compulsive symptoms often improves overall functioning.
Prevention
- Tics cannot be prevented, but their impact can be reduced
- Reduce stress and ensure enough sleep, since fatigue and stress can worsen tics
- Create a supportive environment that does not draw negative attention to tics
- Address related conditions such as anxiety or ADHD early
When to See a Doctor
See a doctor if a child has repetitive involuntary sounds that persist for several weeks or longer, especially if they interfere with school, friendships, or self-esteem. Seek prompt evaluation if the sounds appear suddenly and severely, occur with other new neurological symptoms, or follow a new medication, so that other causes such as allergies, asthma, or a medication reaction can be ruled out.
Frequently Asked Questions
What is a vocal tic?
A vocal tic is a sudden, repetitive, involuntary sound such as throat clearing, sniffing, grunting, or repeating words. In chronic vocal tic disorder, these sounds last more than a year without any motor tics.
How is it different from Tourette syndrome?
Chronic vocal tic disorder involves only vocal tics, while Tourette syndrome involves both motor and vocal tics. The conditions are closely related and are managed in similar ways.
Could my child's throat clearing be allergies instead of a tic?
It can be. Allergies, asthma, and reflux can cause repetitive throat clearing or sniffing. A doctor can help distinguish these from tics, which are involuntary, come and go, and are often preceded by an urge.
How are vocal tics treated?
Many children need only reassurance and education. When tics are bothersome, behavioral therapy such as CBIT is often used first, and medication may be considered for severe or distressing tics.
Will the vocal tics go away?
Many children see their tics improve or fade by late adolescence. Some continue into adulthood, but treatment can reduce their impact when they interfere with daily life.
References
- Centers for Disease Control and Prevention (CDC). Tourette Syndrome and Tic Disorders.
- National Institute of Neurological Disorders and Stroke (NINDS). Tics.
- MedlinePlus, U.S. National Library of Medicine. Tics.
- American Academy of Neurology. Treatment of tics in Tourette syndrome and chronic tic disorders.