Causes Of Adult Stuttering And How Speech Therapy Can Help

Stuttering is often thought of as a childhood condition that improves with age.

Unfortunately, this misconception overlooks the many adults who continue to stutter long after childhood.

For them, stuttering can impact social interactions, professional opportunities, and overall confidence.

Research highlights just how common adult stuttering truly is.

A 2025 study by Gattie et al. estimates that approximately 1% of adults stutter.

Yet fewer than 1% of those individuals actively engage with stuttering communities or seek support.

Increased awareness is essential so that adults who stutter feel empowered to explore their options.

Speech therapy for adult stuttering can look very different depending on the underlying cause — whether developmental, neurological, emotional, or medication-related.

In this article, we’ll explore what stuttering is, why it can persist or emerge in adulthood, and the different factors that may contribute to changes in speech fluency.

What Is Stuttering?

Stuttering is a type of fluency disorder.

We’ve talked about it quite a bit here on our blog.

In particular, we’ve written about some of the most frequently asked questions about stuttering.

But for our purposes today, here’s a shorter overview.

Stuttering, or stammering as some people call it, impacts the flow and rhythm of your speech.

People who stutter speak with certain atypical characteristics, such as repetitions and sound prolongations of words, sounds, syllables, or sentences.

Stuttering doesn’t impact your intelligence; people who stutter can picture what they want to say.

They just face differences in verbalizing the words they picture in their heads.

Adults may stutter for a wide variety of reasons.

Below are some examples.

1. Developmental Stuttering

The first several years of a child’s life is a crucial time for speech and language development.

Many children speak with a stutter as they develop their verbal skills.

We refer to this type of stuttering as “developmental stuttering”.

Developmental stuttering typically impacts children aged 5 and younger.

Many of these children will grow out of their stutters as they further develop their speech and language skills.

RELATED ARTICLE: What Causes Developmental Delays In Speech And Language?

But in some cases, developmental stuttering continues to affect people during their adolescent and adult years.

In other cases, developmental stuttering might reemerge in adults during times of chronic stress or pressure.

Adults with developmental stutters often display secondary characteristics alongside their stutter, such as:

• Eye blinking
• Throat clearing
• Foot stomping
• Word substitutions
• Sentence revisions
• Increased speech rate in attempt to “beat” the stutter
• Reluctance to speak at all

In many cases, the causes of developmental stuttering in adulthood remain unknown.

However, it may indicate differences in speech motor control.

You are also more likely to speak with a developmental stutter an immediate family member also does.

2. Neurogenic Stuttering

Neurogenic stuttering is the most common type of stuttering in adults.

In most cases, this type of stuttering occurs following some form of central nervous system damage.

Two of the most common culprits for neurogenic stuttering are strokes and traumatic brain injuries.

A stroke is a neurological condition that disrupts the supply of blood flow and oxygen to your brain.

Symptoms include:

• Facial drooping
• Weakness or numbness on one side of the body
• Speech challenges, such as slurred speech or stuttering

Confusion

• Vision challenges, such as blurred vision or double vision
• A sudden, severe headache
• Gait or walking challenges
• Vestibular issues, such as dizziness or poor balance

Some people experience a stroke in the areas of their brains responsible for language production.

Subsequently, many stroke survivors deal with some form of stuttering.

In contrast, a traumatic brain injury describes an injury following some type of physical trauma, such as a car crash or heavy blow to the head.

Symptoms include:

• Slurred speech
• Challenges understanding or using speech
• Challenges surrounding nonverbal cues, such as facial expressions
• Difficulty following conversational cues
• Reading comprehension challenges
• Chewing difficulties
• Coughing difficulties
• Swallowing difficulties
• Choking when you eat

Neurogenic stuttering is also a common symptom of traumatic brain injuries, especially when the injury occurred anywhere near the language centers of your brain.

Many other types of injuries and conditions may also cause neurogenic stuttering.

Examples include:

• Brain cysts
• Brain tumors
• Certain infections, such as meningitis or AIDS
• Degenerative diseases, such as multiple sclerosis or Parkinson’s disease
• Misuse of certain drugs
• Certain prescription medications, such as some antiepileptics and antidepressants

3. Stuttering From Emotional Distress

Emotional distress can impact a wide range of your bodily functions and skills.

For instance, many people speak with a stutter during times of emotional distress.

Some people with this type of stutter only experience symptoms during times they feel stressed, nervous, or anxious.

In other cases, people who normally stutter may experience an increase in symptoms during times of emotional distress.

Many different types of factors can contribute to instances of stuttering from emotional distress.

This may include financial hardships, relationship challenges, or other forms of emotional distress.

4. Psychogenic Stuttering

Psychogenic stuttering is another form of stuttering that stems from emotional distress.

However, this form of stuttering is usually more persistent and often occurs following some type of extreme emotional trauma.

Additionally, some people with psychogenic stuttering speak with a stutter as a symptom of certain psychological disorders, such as:

• Depressive disorders
• Conversion disorders
• Generalized anxiety disorder
• Social anxiety disorder
• And much more

Not everyone who lives through emotional trauma will develop a psychogenic stutter.

However, those that do often display certain characteristics.

For instance, psychogenic stuttering most commonly impacts your phonation and articulation skills.

They also don’t typically display the secondary characteristics common with other forms of stuttering, such as developmental stuttering.

Finally, people with a psychogenic stutter may or may not have awareness of their stutters.

RELATED ARTICLE: What’s The Connection Between Speech Therapy And Mental Health?

5. Medication Side Effects

Some types of stuttering emerge as a side effect of certain medications.

If you develop a stutter after taking a new medication, it’s important that you stop taking the medication and speak with your doctor immediately.

In some instances, your physician might be able to adjust your dosage or switch your medications.

This type of stuttering generally stops once you stop taking the medication.

However, in some cases, your physician might decide that the benefits for the medication outweigh the stuttering risk.

In these cases, a speech therapist can help you manage your stuttering symptoms and develop strategies to lessen your stutter.

6. Other Possible Causes

Adults who stutter may do so for any number of additional reasons.

For instance, some adults who stutter have slight differences in their brain compared with non stutters.

Additionally, certain neurological conditions, such as Parkinson’s disease or amyotrophic lateral sclerosis (ALS), may cause stuttering in adults.

Finally, many types of stuttering are idiopathic.

This means that the stuttering develops without any known cause or factors.

What To Do If You’ve Developed A Stutter In Adulthood

Regardless of the cause of your stuttering, a speech therapist can help.

You might consider consulting with a speech therapist if your stutter:

• Persists for six months or longer
• Causes other speech or language problems
• Occurs alongside muscle tightness
• Impacts your ability to communicate in social settings
• Causes anxiety or other mental health challenges

A speech therapist can provide both diagnostic and intervention services.

We’ll start by conducting an in depth evaluation to determine your unique challenges and areas for improvement.

From there, we’ll put together a specialized treatment plan that focuses on your specific strengths and challenges.

There are many different intervention techniques your speech therapist might utilize during treatment.

Some examples include:

• Delayed auditory feedback
• Frequency altered auditory feedback
• Masking auditory feedback
• Speech modification techniques
• Postural changes and jaw positioning
• And much more

Book Your Appointment With The Voz Institute Today

Living with a stutter as an adult can feel isolating, especially when so many people assume it’s something you “should have outgrown.”

The reality is that adult stuttering is more common than many realize, and support is available no matter the cause.

Whether your stutter is developmental, neurogenic, emotionally driven, or medication-related, adult speech therapy can help you develop practical strategies to improve fluency and communicate with greater confidence.

Treatment is always personalized, focusing on your unique speech patterns, goals, and daily communication demands.

You deserve to feel empowered in your voice — not limited by it.

Book your appointment with The Voz Institute today and take the first step toward building confidence and control in your speech.