FND Education Project

REFERENCE · DIAGNOSIS

Functional Cough and Upper-Airway Symptoms

Refers to:

  • persistent functional or habitual cough;
  • recurrent throat clearing; and
  • an assessed functional laryngeal, upper-airway or breathing presentation within this clinical scope.

Scope boundary: This category does not include generic breathlessness or every chronic cough. Swallow-related coughing belongs in a swallowing and airway-safety assessment, and respiratory, cardiac, allergic, infectious, medication-related and structural causes still require appropriate evaluation.

Quick Reference

Presentation: Identify a positive symptom pattern while assessing respiratory, laryngeal, medication-related and other causes; there is no single decisive bedside sign.

More techniques: See the full list below.

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For the Person With FND

You may find yourself coughing repeatedly, clearing your throat again and again, or noticing throat tightness, a changed voice or difficulty getting air in during an episode. These descriptions help you decide whether this page is relevant; they do not identify the cause.

This page brings together repeated cough, throat clearing and assessed functional laryngeal symptoms. Diagnosis depends on the particular symptom pattern and appropriate respiratory or laryngeal assessment. Persistent cough without an identified structural cause is not enough to establish FND. [1][5]

The assessment looks at the whole pattern: onset, triggers, sound, timing, breathing, voice, speaking, sleep and what happens during different tasks. Depending on the symptom, respiratory testing, ear-nose-throat examination or laryngoscopy may be needed. Asthma, infection, reflux, medication effects, inducible laryngeal obstruction and other causes must be considered. [1]

There is no single cough sound or response to distraction that confirms a functional diagnosis. New breathing difficulty, blue colour, chest pain, coughing blood or another emergency feature requires urgent care.

Understanding the different labels

Ask which diagnosis is being considered and what supports it. Cough hypersensitivity, tic cough, somatic cough disorder and inducible laryngeal obstruction (ILO) are different frameworks; a referral to speech-language therapy does not by itself establish FND. Baker and colleagues propose a broad functional framework for laryngeal hypersensitivity, whereas respiratory guidance describes it as a treatable feature across conditions. This page retains that distinction. [1][2][5]

Daily life and the limits of a brief assessment

Chronic cough research describes exhaustion, discomfort, urinary leakage and effects on mood and quality of life. These findings concern chronic cough broadly, not a defined functional-cough population. [5]

Tell the team what happens during meals, conversations, travel, work or school, including recovery time and help you need. A quiet appointment or one successful breathing cue leaves those questions open. Written communication, breaks and changes to the environment can be discussed while assessment continues. These are practical planning prompts, not assumptions about what everyone experiences.

Episodes, bouts and persistent symptoms

Functional cough, throat clearing or upper-airway symptoms may occur in discrete bouts, be strongly linked to particular situations, recur through the day, or remain persistent. An episode can also leave throat irritation or fatigue after the most obvious coughing or breathing change has settled. Duration and trigger pattern help describe the problem but do not establish its cause.

At the onset of a familiar mild episode, use only the breathing or competing response already selected during respiratory or speech-language assessment and reduce known irritants when practical. Do not force breath-holding or suppress a serious airway warning. Severe breathlessness, blue/grey colour, chest pain, coughing blood, reduced consciousness or a substantially new pattern requires urgent care.

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
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For Family, Friends, and Other Supporters

Do not expose the person to scents, smoke, exercise or stressful situations to see whether coughing or breathing changes. Follow the respiratory or speech-therapy plan they have been given. During serious breathing difficulty, prioritize emergency care rather than recording.

It can help to note the context, duration, sound, voice changes and recovery of spontaneous episodes, including whether the symptom occurs during sleep. These observations support clinical history but do not settle the diagnosis.

Ask permission before keeping notes or sharing a recording. Help communicate what an ordinary day is like, including activities the appointment did not sample. Ask who will coordinate respiratory, ENT and speech-language follow-up and when the explanation should be revisited.

When a familiar episode begins

Reduce avoidable irritants and extra talking, and use one agreed cue rather than coaching several breathing steps at once. Do not withhold prescribed respiratory treatment because a functional component has been diagnosed. If the person cannot speak, has severe breathing difficulty or develops another emergency feature, follow emergency guidance rather than continuing a functional symptom technique.

A short cough bout and a flare lasting much longer should both be described accurately. Note what happened before the episode, how long the active symptoms and recovery lasted, and whether the pattern was typical.

For the Person With FND
For Family, Friends, and Other Supporters
For Clinicians and the Care Team
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For Clinicians and the Care Team

Featured technique: Multidisciplinary history and laryngeal-respiratory assessment across relevant conditions.
Diagnostic method: Identify a positive symptom pattern while assessing respiratory, laryngeal, medication-related and other causes; there is no single decisive bedside sign.
Media needed: Speech-pathology or laryngoscopy process demonstration without deliberately provoking symptoms.

Motor and vocal tic-like symptoms

Throat clearing or cough-like sounds can occur in tic disorders as well as airway conditions. The sound alone cannot identify the cause. See the dedicated functional-tics page. [4]

Episodic and prolonged presentations

Document whether the cough or upper-airway symptom is episodic, trigger-linked, recurrent or persistent. Record episode duration, frequency, earliest urge, respiratory and voice changes, sleep pattern, environmental context, recovery and response to prescribed respiratory treatment. Fluctuation and suppressibility are not sufficient to diagnose a functional disorder.

When the phenotype is established, provide a short onset plan using one or two assessed competing responses or efficient-breathing cues and explicit emergency thresholds. Do not deliberately provoke severe respiratory symptoms to demonstrate the diagnosis, and do not let the functional formulation obscure asthma, infection, reflux, medication effects, inducible laryngeal obstruction or other comorbidity.

Technique outline: cough and upper-airway pattern assessment

The preserved seven-step outline is now in Clinical Cough Assessment.

Media contributor brief

The original brief is preserved in Clinical Cough Assessment: Media and Accessibility.

Recovery reading: Ten detailed cough and upper-airway recovery pages, with individualized safety limits and separate guidance for the person, supporters and clinicians.

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Diagnostic techniques at a glance

These brief entries describe signs, observations, criteria and investigations clinicians may consider. They are not a checklist of tests everyone needs. Evidence and limitations differ for each entry; a positive sign must fit the whole clinical picture, including possible coexisting disease.

All seven original descriptions and their sources remain in the preserved inventory. The three detailed guides group related questions without presenting every entry as a separate validated test.

Tic-cough assessment

Tic-cough assessment — Tic features after medical cough assessment.

Somatic cough syndrome criteria

Somatic cough syndrome criteria — A separate clinical criteria framework; normal tests alone are insufficient.

Cough sound and sleep pattern

Cough sound and sleep pattern — Historical observations with important diagnostic limitations.

Task and attention comparisons

Task and attention comparisons — Clinician-selected comparisons and their interpretive limits.

Laryngoscopy during typical airway symptoms

Laryngoscopy during typical airway symptoms — Specialist assessment of relevant laryngeal narrowing.

Continuous laryngoscopy during exercise

Continuous laryngoscopy during exercise — A supervised investigation for exertional laryngeal symptoms.

Respiratory and other differential testing

Respiratory and other differential testing — Investigation of competing or coexisting causes.

Research and Sources

Evidence notes

  • Baker/Stone and colleagues supply the principal clinical consensus framework. Its broad terminology does not erase the separate criteria and respiratory investigations described here. [1]
  • The CHEST cough framework has low-quality evidence; its limitations are detailed in the linked guide. Functional tic-like phenomena require their own assessment. [2][4]
  • ILO sources support specialist airway assessment. The 2023 Delphi study supplies consensus criteria, and current ASHA guidance describes multidisciplinary assessment and laryngoscopy during relevant symptoms. [3][6][7]
  • Adult chronic-cough guidance informs the respiratory differential and life-impact discussion, with no automatic extrapolation to children or all people with FND. [5]

Citation table

Citation Full citation
[1] Baker J, Barnett C, Cavalli L, et al. Management of functional communication, swallowing, cough and related disorders: consensus recommendations for speech and language therapy. Journal of Neurology, Neurosurgery & Psychiatry. 2021;92(10):1112–1125. FND-CIT-0025. https://doi.org/10.1136/jnnp-2021-326767
[2] Vertigan AE, Murad MH, Pringsheim T, et al. Somatic Cough Syndrome (Previously Referred to as Psychogenic Cough) and Tic Cough (Previously Referred to as Habit Cough) in Adults and Children: CHEST Guideline and Expert Panel Report. Chest. 2015;148(1):24-31. DOI. PMID: 25856777. FND-CIT-0129.
[3] Haines J, Esposito K, Slinger C, et al. UK consensus statement on the diagnosis of inducible laryngeal obstruction in light of the COVID-19 pandemic. Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology. 2020;50(12):1287-1293. DOI. PMID: 33034142. FND-CIT-0147.
[4] Malaty IA, Anderson S, Bennett SM, et al. Diagnosis and management of functional tic-like phenomena. Journal of Clinical Medicine. 2022;11(21):6470. DOI. FND-CIT-0110.
[5] Parker SM, Smith JA, Birring SS, et al. British Thoracic Society Clinical Statement on chronic cough in adults. Thorax. 2023;78(Suppl 6):s3–s19. DOI. FND-CIT-0254.
[6] Leong P, Vertigan AE, Hew M, et al. Diagnosis of vocal cord dysfunction/inducible laryngeal obstruction: An International Delphi Consensus Study. Journal of Allergy and Clinical Immunology. 2023;152(4):899–906. DOI. FND-CIT-0255.
[7] American Speech-Language-Hearing Association. Inducible Laryngeal Obstruction (ILO). Practice Portal. Professional guidance. Accessed October 11, 2026. FND-CIT-0269.

Technique outline created: August 24, 2026 · Speech-language-pathology, ENT and respiratory review pending

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