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Neurodevelopmental Condition

Stammering (stuttering)

Stammering (also called stuttering) is a speech fluency disorder affecting around 1% of adults, characterised by repetitions, prolongations and blocks that disrupt the flow of speech. Far beyond the physical disruption, stammering often generates significant anxiety, avoidance and identity challenges. Specialist speech and language therapy and psychological approaches both produce meaningful improvement in fluency, confidence and quality of life.

See therapies that may help

What is Stammering (stuttering)?

Stammering involves disruptions to the normal flow of speech — including sound, syllable or word repetitions ("b-b-but"), prolongations ("ssssun"), and blocks (silent moments where speech is momentarily stuck). Secondary behaviours — eye blinks, head movements, loss of eye contact — often develop as strategies to release the stammer.

Around 5% of children stammer, but most recover spontaneously. Persistent developmental stammering in adults affects around 1% of the population, more commonly men than women. There is a strong genetic component. The physical stammer is the surface feature — the significant psychological dimensions of stammering, including anticipatory anxiety, avoidance of words and situations, and impact on identity, are often more disabling than the stammer itself.

Signs and symptoms

Stammering presentations may include:

  • Repetitions, prolongations or blocks in speech
  • Secondary behaviours — physical movements used to release stammers
  • Avoidance of specific feared words or sounds, substituting easier alternatives
  • Avoidance of speaking situations — phone calls, presentations, meeting new people
  • Significant anxiety before and during speaking situations
  • Impact on career, relationships or daily activities due to stammering
  • Significant distress, shame or reduced self-confidence related to stammering

How therapy can help

Effective approaches for stammering address both the physical and psychological dimensions:

  • Specialist SLT for stammering — fluency shaping approaches (teaching new speech patterns) and stammering modification approaches (changing how the stammer is produced rather than eliminating it); the most evidence-based physical approaches
  • Acceptance and commitment therapy (ACT) — building psychological flexibility and willingness to communicate in the presence of stammering; reducing avoidance and building values-based communication behaviour
  • CBT — addressing the anxiety, avoidance and negative beliefs about stammering that are often more limiting than the stammer itself
  • Intensive group programmes — combining SLT and psychological approaches in an intensive format; high motivation and peer support produce significant outcomes
  • Self-help and peer support — stammering organisations and self-help groups provide community, acceptance and shared strategies

Seeking help

The British Stammering Association (stamma.org) provides resources, a helpline, therapist directory and peer support. Michael Palin Centre for Stammering in London is the UK's leading specialist centre for children and adults. NHS SLT services accept stammering referrals; waiting times vary. Many people who stammer find peer connection with other people who stammer as valuable as clinical treatment.

Therapies that may help with Stammering (stuttering)

Showing 8 therapies linked to Stammering (stuttering).

Therapy Evidence Notes
Cognitive Behavioural Therapist
strong

CBT helps reframe the anxious thoughts and avoidance around speaking that often accompany stammering, easing fear of certain words or situations.

Counsellor
strong

Counselling offers space to explore the frustration, self-consciousness and low confidence that living with a stammer can bring.

Psychotherapist
strong

Psychotherapy can help unpack deeper feelings of shame or social anxiety tied to stammering and how it shapes self-image over time.

Speech Therapist
strong

Speech and language therapy teaches techniques to ease the flow of speech and manage moments of stammering more confidently.

Arts Therapist
moderate

Arts therapy provides a non-verbal outlet to express the emotions around stammering, which some find supportive alongside speech therapy.

EMDR Practitioner
moderate

EMDR is sometimes used where stammering links to distressing speaking experiences, though evidence here is limited and it does not replace speech therapy.

Hypnotherapist
moderate

Hypnotherapy may help some people feel calmer about speaking, but evidence for stammering is limited and it should complement, not replace, speech therapy.

Mindfulness Practitioner
moderate

Mindfulness can support a calmer, less reactive relationship with moments of stammering, though evidence is limited and it works best alongside proper speech therapy.

Frequently asked questions

Can adults be cured of stammering?

Most specialist stammering clinicians have moved away from the concept of 'cure' towards 'living well with stammering'. While many adults achieve significant improvements in fluency, the goal is typically a life where stammering does not limit what you do or feel. For many people, the greatest change comes from the psychological work — reducing avoidance and building confidence — rather than fluency itself.

Is stammering caused by anxiety?

No — stammering is neurological in origin, not caused by anxiety. However, anxiety is a very significant maintaining and exacerbating factor. The stammer causes anxiety; anxiety worsens the stammer. Most adults who stammer experience significant anticipatory anxiety about speaking situations. Addressing the anxiety component alongside the physical stammer is essential for comprehensive treatment.

What is the difference between fluency shaping and stammering modification?

Fluency shaping approaches teach new speech patterns (controlled fluency) using techniques such as slowing speech rate and smooth transitions between sounds. Stammering modification approaches aim to change how the stammer is produced — making it easier and less tense — rather than eliminating it. Most specialist SLTs use integrated approaches combining elements of both.

Can children grow out of stammering?

Yes — around 75–80% of children who stammer recover spontaneously, typically before age 6. Recovery is more likely in girls and when there is no family history of persistent stammering. Specialist SLT assessment can assess recovery likelihood and support early intervention where indicated. Early therapy improves outcomes.

Does stammering affect career prospects?

Stammering can affect career choices and progression when avoidance leads people to self-select away from roles involving communication. However, many highly successful professionals stammer. Therapeutic work reducing avoidance and building communication confidence significantly expands career options. Stammering is also a protected characteristic under the Equality Act 2010, requiring employers to make reasonable adjustments.