Voice and speech disorders: muscle tension, spasmodic dysphonia, puberphonia and voice care

Topic

Many voice problems come from how the voice is used, not from a lesion; they are treated with voice therapy once the larynx has been seen.

Updated Nov 12, 2026

See it in 3D: Vocal folds · Thyroarytenoid · Lateral cricoarytenoid · Posterior cricoarytenoid · Recurrent laryngeal nerves · Soft palate

Key points

Three groups: structural (nodules, polyps, Reinke oedema), neurogenic (paralysis, spasmodic dysphonia, tremor) and functional (muscle tension, psychogenic, puberphonia).
Always see the vocal folds before voice therapy; dysphonia lasting more than 4 weeks needs laryngoscopy.
Adductor spasmodic dysphonia: strained, strangled voice with breaks that improves when laughing or whispering; treated with botulinum toxin injections every 3 to 4 months.
Psychogenic aphonia: whispers but coughs with a normal sound, because the folds close fully on coughing.
Puberphonia (mutational falsetto): a boy keeps a high-pitched child voice after puberty with a normal larynx; voice therapy works.
Open nasal voice (hypernasality): cleft palate or palatal weakness; closed nasal voice (hyponasality): adenoids or nasal blockage.

What it is

Voice disorders are grouped by cause. Structural (organic) disorders are lesions you can see: nodules, polyps, cysts, oedema or an ageing larynx. Neurogenic disorders come from the nerves or brain: vocal fold paralysis, spasmodic dysphonia (laryngeal dystonia), tremor, Parkinson disease or myasthenia. Functional disorders come from using the larynx badly with a normal structure: muscle tension dysphonia, psychogenic aphonia and puberphonia. The rule for every one of them is the same: look at the larynx before starting voice therapy, because a cancer can sound like a functional problem. Speech disorders are different from voice disorders: they affect articulation or resonance (for example the nasal voice of a cleft palate or the blocked-nose voice of large adenoids). Teachers, singers and call-centre staff are the classic patients.

Key facts

Drink water through the day and balance caffeine or alcohol with more water; use humidified air in dry places.
Avoid smoking and second-hand smoke; treat reflux.
Rest the voice when ill or hoarse; schedule short vocal rests in a long working day.
Avoid shouting, whispering and talking over background noise; use a microphone in classrooms.
Support the voice with breath rather than straining the throat; seek voice therapy with a speech-language therapist when problems recur.

Structure

Structural: nodules (both sides, voice overuse), polyps (usually one side), cysts, Reinke oedema (smokers), sulcus, scar, presbylarynx (thin, bowed folds in old age).
Neurogenic: unilateral vocal fold paralysis (breathy voice, weak cough), spasmodic dysphonia (adductor, abductor or mixed), essential tremor, Parkinson disease (soft, monotonous voice), myasthenia gravis (voice tires with use).
Functional: primary muscle tension dysphonia, secondary muscle tension (compensating for a lesion), psychogenic (conversion) aphonia or dysphonia, puberphonia, ventricular (false fold) phonation.
Speech (not voice) disorders: dysarthria (motor speech from neurological disease), rhinolalia aperta (hypernasality) and rhinolalia clausa (hyponasality).

In clinical practice

Muscle tension dysphonia: rough, strained or effortful voice, neck tension, throat pain after talking; the larynx sits high and the supraglottis squeezes on laryngoscopy, with no lesion.
Spasmodic dysphonia usually starts at 30 to 50 years, more in women; it is a neurological dystonia, sometimes with dystonia elsewhere or voice tremor.
Abductor spasmodic dysphonia gives a breathy voice with breathy breaks; it responds less well to botulinum toxin.
Psychogenic aphonia often starts suddenly after stress; the folds move normally for breathing and coughing.
Puberphonia: high, weak or breaking voice in a teenage boy whose larynx has grown; pressing the thyroid cartilage backwards (Gutzmann test) brings out a lower voice.
Voice users at risk: teachers, singers, salespeople, call-centre workers, coaches; voice care is part of prevention.

Next step / Initial management

First workup: duration, voice use, tobacco, reflux, neurological symptoms and medication; refer to ENT for laryngoscopy (ideally with stroboscopy) if dysphonia lasts more than 4 weeks.
Refer as a priority (within two weeks) smokers, drinkers and patients with a neck lump, dysphagia, pain or haemoptysis; refer the same day for stridor.
Functional dysphonia, nodules, puberphonia and psychogenic aphonia: voice therapy with a speech-language therapist after laryngoscopy; psychological support when stress or anxiety drives it.
Suspected spasmodic dysphonia or tremor: routine referral to ENT and neurology; botulinum toxin injections into the laryngeal muscles are the main treatment.
Breathy voice after neck or chest surgery: early ENT referral to assess vocal fold paralysis.
Puberphonia: also check pubertal development; refer to endocrinology if it is delayed.

Test yourself

Think of the answer, then tap the question to see it.

A 42-year-old woman has a strained, strangled voice with breaks on vowels, which improves when she laughs or whispers. Laryngoscopy shows no lesion. What is the diagnosis and treatment?

Adductor spasmodic dysphonia (laryngeal dystonia); botulinum toxin injections into the laryngeal muscles, repeated every 3 to 4 months, with voice therapy as support.

A young woman suddenly whispers after a family conflict, but her cough sounds normal. What is the likely diagnosis?

Psychogenic (functional) aphonia: the folds close normally on coughing. Confirm with laryngoscopy and treat with voice therapy and psychological support.

A 17-year-old boy with normal puberty still has a high-pitched, breaking voice. What is it and how is it treated?

Puberphonia (mutational falsetto); voice therapy with a speech-language therapist, which usually brings down the pitch quickly.

A child has a hyponasal voice, mouth breathing and snoring. What type of speech change is this and the likely cause?

Rhinolalia clausa (hyponasality), usually from enlarged adenoids or nasal obstruction.

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Educational content; it does not replace a medical assessment and is not a clinical instruction. For a real case, follow current guidelines and specialist advice.

Sources: Functional Voice Disorders (StatPearls Publishing (NCBI Bookshelf), 2023); Dysphonia (StatPearls Publishing (NCBI Bookshelf), 2024); Laryngeal Botulinum Toxin Injection (StatPearls Publishing (NCBI Bookshelf), 2023); Unilateral Vocal Fold Paralysis (StatPearls Publishing (NCBI Bookshelf), 2024); Spasmodic Dysphonia (National Institute on Deafness and Other Communication Disorders (NIDCD), NIH, 2020); Taking Care of Your Voice (National Institute on Deafness and Other Communication Disorders (NIDCD), NIH, 2025).

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