GC141 A Child With Cough Acute And Chronic Cough In Children
Acute cough in children lasts less than 4 weeks and is usually infectious, while chronic cough persists beyond 4 weeks and requires evaluation for underlying causes such as asthma, protracted bacterial bronchitis, or foreign body aspiration.
A Child with Cough: Acute and Chronic Cough in Children
The big idea: Cough in children is extremely common and usually self-limiting, but the same symptom can signal foreign-body aspiration, protracted bacterial bronchitis (PBB), bronchiectasis or another important disorder. Use the history, examination, duration and specific cough pointers to decide who needs reassurance and who needs urgent or directed investigation. Treat the cause rather than reflexively suppressing a protective symptom. [1][9]
Learning objectives (from Block C learning points): [2]
- Understand the cough reflex arc and its protective role
- Systematically approach a child with acute and chronic cough (Who/What/How/When)
- Differentiate acute vs chronic cough with correct thresholds
- Recognize specific cough pointers (red flags) that demand investigation
- Know the evidence against OTC cough suppressants in children
- Treat the cause, not the symptom
1. The Cough Reflex — First Principles
Cough is under both voluntary and involuntary control. It clears the airways of secretions and is the primary mechanism for secretion removal when respiratory cilia are damaged by inflammation. [1]
Cough is a protective reflex. When mucociliary clearance is intact, the mucociliary escalator carries debris and mucus upward. When the cilia are damaged (by viral infection, smoke, chronic inflammation), cough takes over as the backup clearance mechanism. This is why suppressing cough in a child with pneumonia or bronchiectasis can be actively harmful—you remove the only remaining defense against secretion retention. [1]
Cough receptors are located within the epithelium of the pharynx, larynx, trachea, and major bronchi. [1]
| Location | Stimulus type | Clinical relevance |
|---|---|---|
| Pharynx, larynx, trachea, major bronchi | Mechanical, chemical, thermal | Main site — explains cough from URI, croup, foreign body |
| Pharynx | Mechanical (postnasal drip) | Upper airway cough syndrome |
| Paranasal sinuses | Inflammatory mediators | Sinusitis causing chronic cough |
| Stomach / oesophagus | Acid, distension | Reflux can accompany cough, but do not diagnose or treat GERD as the cause without compatible gastrointestinal features [18] |
| External auditory canal (EAC) | Mechanical (Arnold nerve branch of vagus) | Ear wax, otitis can trigger cough |
Key exam point: The source of persistent cough may not be in the lungs. Receptors also exist in the pharynx, paranasal sinuses, oesophagus and EAC. [1][2] This broadens the examination, but receptor anatomy alone does not prove that reflux or sinus disease caused the cough.
Afferent fibres from the vagus nerve travel to the cough centre in the upper brainstem; efferent fibres from the vagus nerve and spinal cord go to the larynx, diaphragm, and abdominal muscles to produce a cough. [1]
Stimuli → cough receptors → afferent vagus → medullary cough centre (upper brainstem) → efferent via vagus + spinal motor nerves → larynx (glottic closure), diaphragm + abdominal muscles (explosive expiration) → cough
Higher cortical control allows cough inhibition and voluntary cough. [1]
Voluntary control also helps explain why a tic cough may be suppressible or distractible. Current terminology distinguishes tic cough from somatic cough disorder. Suppressibility, distractibility, suggestibility, variability and a premonitory sensation support a tic; a honking sound or absence during sleep alone does not establish the diagnosis. [9]
Cough receptors are stimulated by local mediators: histamine, prostaglandins, leukotrienes, and by local bronchoconstriction. [1]
This is why asthma causes cough — bronchoconstriction and airway inflammation release these mediators, stimulating cough receptors even if the child does not wheeze audibly (the concept of cough-variant asthma).
Causes of cough in children may be different from adults. [1]
| Respiratory causes | Non-respiratory causes |
|---|---|
| Upper respiratory tract infection | Heart failure |
| Postnasal drip syndrome (Upper airway cough syndrome) | Gastroesophageal reflux |
| Asthma | ACE inhibitor |
| Aspiration | Tic cough / somatic cough disorder |
| Pneumonia/pneumonitis | |
| Bronchiectasis |
Exam Trap
Do not transplant an adult chronic-cough triad into children. Paediatric causes are age-dependent: consider congenital/aspiration disorders in infancy, foreign-body aspiration in toddlers, and PBB or asthma in the appropriate phenotype.
3. Clinical Approach: The "Who/What/How/When" Framework
The lecture organizes history-taking into four domains: Who, What, How, When. [1] This is a systematic method to narrow the differential.
Age, previously healthy?, immunocompromised/HIV infected?, neurologically impaired?, atopic?, living at home or institution? [1]
| Feature | Why it matters | Diagnostic implications |
|---|---|---|
| Age | Different organisms and conditions dominate at different ages | Neonatal cough → congenital/aspiration causes; toddler → foreign body; school-age → asthma, infection or tic cough |
| Previously healthy | Rules out chronic underlying condition | |
| Immunocompromised | Opportunistic organisms (Pseudomonas, Pneumocystis, fungi) | Must have lower threshold for investigation |
| Neurologically impaired | Swallowing incoordination → aspiration pneumonia | The 2024 MCQ (Q93) tests this directly — in a child with CP and chronic cough, choking on feeding (aspiration) is the most relevant history [8] |
| Atopic | Asthma, allergic rhinitis → postnasal drip | Family and personal history of atopy |
| Institutional vs. home | Exposure and outbreak risks differ | Ask about close contacts, recent healthcare exposure and local epidemiology rather than assuming a particular organism |
3.2 WHAT Is the Cough Like?
Dry? Productive? Blood-stained? Barking? Brassy? Wheezy? Paroxysmal? [1]
Mucus is produced by goblet cells and submucosal glands under normal conditions and may increase in illness. 'Sputum' or 'phlegm' = airway mucus from trachea/bronchi/bronchioles. Exudates = protein-rich fluid leaked from capillaries into alveoli due to inflammatory response, usually infection. [1]
Practical point: Young children swallow sputum; a parent reporting "wet-sounding cough" does not mean the child is truly productive. Beware of the "sputum sound" — it may be nasal mucus dripping posteriorly, not lower airway secretion.
Specific cough associations: [1]
| Cough type | Association | Explanation |
|---|---|---|
| Whooping cough | Pertussis | Paroxysmal cough followed by inspiratory "whoop" due to forced inspiration through narrowed glottis |
| Barking or brassy cough | Croup, tracheomalacia | Inflammation or dynamic collapse of the extrathoracic airway can produce this quality; sound alone is not diagnostic |
| Paroxysmal (± whoop) | Pertussis, Mycoplasma, parapertussis, virus | |
| Nocturnal | Upper or lower respiratory allergy, sinusitis | Postural increase in postnasal drip, nocturnal bronchoconstriction |
| Tight (wheezy) | Reactive airway/Asthma | Bronchoconstriction causing audible wheeze with cough |
| Staccato | Chlamydia | Short, choppy cough in afebrile neonate — classic for Chlamydia trachomatis pneumonia |
| Honking or repetitive | Possible tic cough | Diagnose from core tic features, not sound or night-time pattern alone [9] |
Exam Pearl
Only brassy vs non-brassy cough has been validated for sensitivity (0.81) and specificity (0.57) for tracheomalacia. All other cough-character associations are clinically useful but not rigorously validated. [1]
After feeding? In the middle of the night? When the weather changes and turns cold? When someone smokes? With exertion? Associated with fever? Associated with runny nose? [1]
| Timing | Points to… | Why? |
|---|---|---|
| After feeding | Aspiration; reflux when GI features coexist | Swallowing incoordination is especially important in neurologic impairment [18] |
| Middle of the night | Asthma, sinusitis | Circadian variation in cortisol + vagal tone; postnasal drip worsens supine |
| Cold weather/weather change | Asthma | Cold air triggers airway hyperreactivity |
| Smoke exposure | Reactive airway | Direct chemical irritation + bronchoconstriction |
| With exertion | Asthma, heart failure | Exercise-induced bronchoconstriction; exertional pulmonary congestion |
| With runny nose | Viral URTI | Postnasal drip mechanism |
| Variable or distractible/suppressible | Tic cough | Look for the core features of a tic; disappearance during sleep is not diagnostic [9] |
The most common stimulus of cough is irritation or inflammation of the respiratory epithelium. [1]
4. Acute Cough in Children
The lecture defines acute cough as < 3 weeks. [1] For current paediatric decision-making, the more important boundary is that daily cough lasting > 4 weeks is chronic and warrants systematic assessment. A post-infectious cough can overlap this boundary, so duration must be read with its trajectory and clinical pointers. [9][10]
Viral URTIs account for most acute cough at all ages. Self-limiting. Usually lasts 1–3 weeks. [1]
Reading the symptom-duration graphics (slides 17–18)
- The 1967 rhinovirus chart is a historical natural-history dataset, not a deadline for recovery. Nasal discharge persists longer across the group than sore throat or cough; individual children vary.
- “Two weeks of cough” is not a complete history. The trajectory may be continuously improving, relapsing with successive viral infections, or progressively worsening. The latter two patterns prompt different questions even when the calendar duration is identical.
| Level | Viral | Bacterial |
|---|---|---|
| URI | Influenza, RSV, parainfluenza, adenovirus, rhinovirus, human coronavirus, human metapneumovirus, bocavirus | — (usually viral) |
| LRI | Same viruses | Streptococcus pneumoniae, Haemophilus influenzae, Pseudomonas (if immunocompromised), Chlamydia (if neonate) |
Acute cough can also be an exacerbation of a pre-existing condition: asthma, bronchiectasis, upper airway cough syndrome (postnasal drip). [1]
Main issues to sort out: (1) Severity — does this patient need supportive treatment? (2) Etiology — infectious vs non-infectious; if infectious, can you rule out lower respiratory tract infection? (3) Likely organism. [1]
Examination checklist: [1]
- Temperature (fever)
- Vital signs
- Respiratory distress? → Respiratory rate, retractions/insucking/accessory muscle use, cyanosis, SpO₂, dyspnoea/SOB
- Chest exam: deformity, percussion, auscultation (wheeze, crepitations, rhonchi)
- Associated findings: skin rash, eczema, tonsils, lymph nodes, rhinorrhoea
Age-specific tachypnoea thresholds (critical for exams): [1]
| Age | Tachypnoea threshold (breaths/min) |
|---|---|
| < 2 months | > 60 |
| 2–12 months | > 50 |
| 1–5 years | > 40 |
High Yield
The lecture's age thresholds are WHO-style screening cut-offs, not universal “normal values.” Absence of fever, tachypnoea and focal chest signs lowers the probability of pneumonia, but does not by itself exclude lower-respiratory disease. Interpret respiratory rate with age, fever, distress, oxygen saturation and the whole examination. [1][12]
Most children with cough due to a simple URI do not need any investigations. [1]
Do not obtain a CXR routinely for an uncomplicated acute viral cough. Consider imaging when the child is severely ill, the diagnosis or complication is uncertain, there are focal/persistent signs, haemoptysis, a suspected foreign body, or an undiagnosed chronic disorder. Duration beyond an arbitrary two-week point alone is not an indication. [9][12]
CBC, microbiology, respiratory-virus testing and cultures are targeted investigations rather than a routine panel. Test when the result will alter isolation, antiviral/antibiotic management, assessment of severe disease or a specific differential. Blood cultures have low yield in uncomplicated community-acquired pneumonia. [12]
Approach to try to arrive at a specific diagnosis for acute cough: [1]
| Question | Features | Likely diagnosis |
|---|---|---|
| Is this an acute URI? | Coryzal symptoms, fever, sore throat | URI |
| Is this a croup syndrome? | Stridor, 'barking' or 'croupy cough', hoarseness, ± fever | Viral croup, recurrent spasmodic croup, bacterial tracheitis |
| Is this a lower respiratory tract illness? | Tachypnoea (age-specific thresholds), respiratory distress with ↑WOB, chest signs (crepitations or wheeze/rhonchi), fever | Acute bronchiolitis, pneumonia (viral/bacterial), asthma |
| Is this an allergic/atopic illness? | Seasonal and diurnal variation, association with rhinitis, posture, 'clearing of throat', triggers (dust, pollutant, pollen) | Postnasal drip from allergic rhinitis, reactive airway/asthma |
| Is this an acute exacerbation of a chronic disorder? | Failure to thrive, finger clubbing, chest deformity, features of atopy | → Continue with chronic cough workup |
5. Chronic Cough in Children
Current paediatric guidance defines chronic cough as daily cough lasting > 4 weeks. [9][10] The lecture also shows the older BTS > 8-week definition and a 2–8-week “grey area”; retain that as historical context, not the preferred clinical threshold. [1]
The first useful split is: [1][9]
- Specific cough: Cough with signs/symptoms suggestive of an associated respiratory or systemic problem
- Non-specific cough: Dry cough in the absence of identifiable respiratory disease
Exam Note
Use > 4 weeks unless a question explicitly asks for the historical definition. A persistent wet cough is itself a pointer and should not be placed in a watch-and-wait “non-specific” group.
How did the cough start? What is the quality? When did it start? What triggers it? [1]
| Feature | Examples | Differential diagnosis |
|---|---|---|
| Very acute onset / after choking | Sudden cough in toddler | Inhaled foreign body |
| With URI | Post-viral cough | Post-viral cough |
| Neonatal onset | Born coughing or cough from first weeks | Aspiration, congenital malformation, cystic fibrosis, primary ciliary dyskinesia |
| Productive (moist/wet) | Daily wet cough | Chronic suppurative disease (e.g., bronchiectasis) |
| Paroxysmal ± whoop | Pertussis | |
| Haemoptysis | Adolescent with haemoptysis | TB, bronchiectasis, AV malformation |
| Variable, suppressible or distractible repetitive cough | Tic cough | |
| Exercise, cold air, early morning | Asthma | |
| Feeding | Recurrent aspiration |
Specific cough = associated with signs and symptoms of an underlying respiratory or systemic disease. [1]
| Abnormality | Examples of aetiology |
|---|---|
| Wheeze | Intrathoracic airway lesion (asthma, foreign body) |
| Crepitations | Parenchymal disease |
| Chest pain | Pleural/parenchymal disease, asthma or another cardiopulmonary cause |
| Chest wall deformity | Chronic airway or parenchymal disease |
| Digital clubbing | Chronic suppurative lung disease |
| Daily moist/productive cough | Suppurative lung disease |
| Failure to thrive | Serious systemic including pulmonary illness |
| Feeding difficulties | Serious systemic including pulmonary illness, aspiration |
| Hypoxia/cyanosis | Airway or parenchymal disease, cardiac disease |
| Neurodevelopmental abnormality | Aspiration lung disease |
| Recurrent pneumonia | Immunodeficiency, congenital lung abnormalities, tracheo-oesophageal H fistula |
The age at which chronic cough begins narrows the differential significantly. [1]
| Infancy | Early childhood | Late childhood / Adolescence |
|---|---|---|
| Aspiration | Aspiration | Aspiration (degenerative neuromuscular disease) |
| Reactive airway | Asthma | Asthma |
| Congenital malformation: laryngotracheomalacia, bronchomalacia, vascular compression (ring/sling, innominate artery) | Bronchiectasis (immunodeficiency, CF, post-infectious) | Bronchiectasis (immunodeficiency, CF, post-infectious) |
| Infection: Chlamydia, pertussis, TB, post-RSV | Infection: viral, TB, Mycoplasma, fungal | Infection: viral, TB, Mycoplasma, fungal |
| Passive smoking, congenital heart disease | Sinusitis | Sinusitis |
| Smoking (active and passive) | ||
| Tic cough / somatic cough disorder | ||
| Mediastinal tumour |
The lecture lists post-viral cough, successive acute infections, foreign body, asthma and GERD. [1] In current practice, revisit the “non-specific” label if there is wet cough or another pointer; do not treat reflux without compatible features. [18]
Management approach: [1]
- Evaluate for tobacco smoke and other pollutants. The slide's “50% with two smoking parents” figure is a historical study result, not a universal contemporary prevalence estimate.
- Assess the child's activity level
- Address parental expectations and concerns
- Watch, wait and review — likely to resolve without specific treatment
- Reassess after a defined interval; earlier review is needed if new pointers, a wet cough, deterioration or parental concern develops
Growth and development, respiratory distress, digital clubbing, upper respiratory tract (sinusitis signs, allergic rhinitis signs), lower respiratory tract (chest deformity — Harrison sulcus, pectus carinatum, barrel chest; hyperresonance; crepitations, wheeze, rhonchi), cardiac (murmur/heart failure), skin (eczema). [1]
Start with a CXR and spirometry when age-capable, alongside a careful history and examination. Normal results do not override convincing pointers. Additional tests are directed by the suspected disease rather than ordered as a universal battery. [9][10]
| Investigation | What it screens for |
|---|---|
| CXR | Pneumonia, TB, foreign body, chest deformity, cardiac enlargement |
| Spirometry ± bronchodilator response | Objective evidence of variable airflow limitation when the child can perform it reliably |
| CBC with differentials | Eosinophilia (allergy), neutrophilia (bacterial infection), lymphopaenia (immunodeficiency) |
| Mantoux test (MT5) / PPD | TB |
| Interferon-based test (IGRA) | TB (more specific than MT) |
| Sputum or gastric aspirate | AFB for TB |
| HRCT | Bronchiectasis, interstitial lung disease |
| Nasal NO / Cilia study / Sweat test | Primary ciliary dyskinesia (low nasal NO + abnormal cilia), cystic fibrosis (elevated sweat chloride) |
| Immunoglobulin pattern | Primary immunodeficiency |
| Reflux testing | Only when gastrointestinal features or another specific indication makes reflux clinically plausible [18] |
| Video fluoroscopy | Swallowing incoordination / aspiration |
| Bronchoscopy with BAL | Foreign body, chronic infection, suppurative disease |
Persistent wet cough and PBB. PBB is a common, treatable cause of chronic wet cough in otherwise well children. Think of it when a wet cough persists > 4 weeks without another specific explanation; investigate recurrent or non-responsive disease for bronchiectasis or an underlying disorder rather than repeatedly relabelling it “viral.” [9]
Reading the Mantoux slide. The diagram shows an intradermal tuberculin injection forming a small wheal, followed by review at 48–72 hours. Palpate and measure the transverse diameter of induration, not erythema, in millimetres. Interpretation depends on risk and the local programme; the test cannot distinguish latent from active TB, and active disease requires its own diagnostic work-up. [16]
6. Treatment Principles
Cough is a symptom telling you something is wrong. Find the cause. Treat the underlying cause if indicated. Very diverse treatment: bronchodilator, surgery, antibiotics, anti-TB, anti-fungal, stop smoking etc. [1]
No specific antiviral drug available for most viral infections causing 'bronchitis' or pneumonia. [1]
- Influenza antivirals treat suspected or confirmed influenza, not cough itself. Current options include oseltamivir, zanamivir, peramivir and baloxavir, selected by age, route, contraindications and local susceptibility. [13]
- The slide's amantadine list is obsolete: adamantanes are not recommended for currently circulating influenza A because of widespread resistance. [13]
- Treat children with severe/progressive disease or at higher risk promptly; do not delay indicated treatment while awaiting test results. [13]
Do not use the slide's fixed “Augmentin for typical / clarithromycin-doxycycline-quinolone for atypical” recipe. Antibiotic choice depends on age, severity, immunisation, allergy, comorbidity, recent microbiology and local resistance. In current NICE guidance, amoxicillin is first-line for low-severity community-acquired pneumonia; broader or atypical coverage is reserved for a clinical indication. Course length is deliberately short for uncomplicated low-severity disease and extended only when clinically unstable or a particular organism/complication requires it. Neonates, severe disease and children with important comorbidity need urgent, setting-specific protocols. [12]
7. Cough Suppressants in Children — The Ethical and Evidence-Based Case Against Them
This section is extremely high yield as it represents a key take-home message of the lecture and a common exam theme.
Cough is a natural, protective, beneficial mechanism. [1]
No good evidence to demonstrate effectiveness of OTC cold medication in preschool children. [1]
Cochrane 2004 (7 paediatric studies, 516 children): [1]
- Antitussives no more effective than placebo
- No study on expectorants met inclusion criteria
- 1 trial favoured mucolytic (letosteine) over placebo from day 4–10
- 2 studies showed no difference between antihistamine-decongestant combinations and placebo
- 1 trial showed antihistamine was no more effective than placebo
- Conclusion: no good evidence for or against the effectiveness of OTC medicine in acute cough
| Category | Examples |
|---|---|
| Antihistamine | Diphenhydramine, cyproheptadine, brompheniramine, chlorpheniramine |
| Antipyretic/analgesic | Paracetamol, ibuprofen |
| Antitussive | Codeine, dextromethorphan, hydrocodone |
| Expectorant | Guaifenesin |
| Nasal decongestant | Ephedrine, phenylephrine, pseudoephedrine, phenylpropanolamine |
Codeine: narcotic with addictive potential. Dose-related toxicity: respiratory depression and narcosis. Side effects: somnolence, ataxia, miosis, vomiting, rash, swelling, itching. [1]
Dextromethorphan: considered non-addictive but abused by teenagers — ingesting huge doses results in bizarre behaviour. CNS depression. [1]
The US withdrawal of products marketed for children < 2 years and the subsequent “do not use under 4” manufacturer labelling are safety milestones, not proof that these combinations become effective at age 4. Always check the product and jurisdiction; avoid multi-ingredient products and accidental duplicate dosing. [14]
AAP & ACCP Recommendations (Exam-Critical)
AAP (1997): There are no well-controlled studies to support efficacy of codeine- or dextromethorphan-containing antitussives in children. Suppression of cough in many pulmonary diseases may be hazardous and contraindicated. Dosages for children are extrapolated from adult data. Education of parents about lack of proven effects and potential risks is needed. [1]
ACCP (2006): Doctors should refrain from recommending cough suppressants and other OTC cough medications for young children. [1]
2007: Manufacturers voluntarily withdrew OTC cough-cold medicines for children < 2 years from the US market. [1]
Current safety update: prescription codeine- or hydrocodone-containing cough medicines are restricted by the FDA to adults aged ≥18 because their risks outweigh benefits in children. [15]
A paediatrician is a child's advocate. We treat the child, not the parents. Have to work with caretakers — our role is to educate. Natural course of the illness. Preventive measures when applicable. Symptomatic relief is not everything. Appropriate therapy includes avoiding inappropriate therapy. Patients are not (only) customers. [1]
This is an ethical/professional stance the lecture explicitly states. In an OSCE or SAQ, showing awareness that refusing to prescribe an unnecessary OTC cough medicine is the correct management earns marks.
8. Integration: Key Conditions Causing Cough in Children
- Definition: Coryzal prodrome followed by persistent cough plus tachypnoea/recession and wheeze or crackles, usually in children < 2 years and most often in the first year [11]
- Peak: 1–9 months, most common in winter
- Microbiology: RSV (50–80%), rhinovirus, parainfluenza, adenovirus, HMPV
- Clinical: Preceding coryzal symptoms → SOB, cough, wheezing/crackles, ± resp distress
- Management: Supportive assessment, hydration and respiratory support when indicated. Do not routinely use salbutamol, nebulised adrenaline, hypertonic saline, antibiotics, montelukast, ipratropium or corticosteroids. Give oxygen for persistent hypoxaemia using the age/comorbidity threshold in the local guideline. [11]
- Prevention: RSV prevention now depends on local maternal-vaccine and long-acting-monoclonal programmes; do not assume palivizumab is the only option.
- Age: 6 months – 3 years (peak 6–36 months) [3]
- Hallmark: Barking cough, hoarseness, inspiratory stridor [1][3]
- Differentiating from epiglottitis: Croup has barking cough + stridor + prodromal coryzal symptoms. Epiglottitis has NO cough, drooling, dysphagia, toxic appearance, high fever [3]
- Management: Corticosteroid treatment; nebulised adrenaline for moderate/severe disease with appropriate observation. Humidified air has no established therapeutic benefit.
- Paroxysmal spasmodic cough ± whoop [1]
- Post-tussive vomiting, apnoea in young infants
- Diagnosis: NPA culture/PCR for Bordetella pertussis
- Treatment: Macrolide (azithromycin, clarithromycin) — primarily to reduce transmission; doesn't change clinical course once paroxysmal stage is established
- Asthma may include cough, especially with wheeze, breathlessness, exercise symptoms, atopy or variable airflow limitation, but isolated cough is not automatically “cough-variant asthma.” [9]
- Seek age-appropriate objective evidence (spirometry/bronchodilator response or other variability testing) when feasible. Do not import the adult ≥12% and ≥200 mL rule into young children; interpret current paediatric thresholds and test quality. A time-limited therapeutic trial needs a defined response and stop/review plan.
- Very acute onset or after choking episode [1]
- Age: Typically toddlers (1–3 years) — putting everything in mouth
- CXR: May show unilateral hyperinflation (ball-valve obstruction), atelectasis, or may be normal
- Gold standard: Rigid bronchoscopy (diagnostic + therapeutic)
- Clinical pearl: If history of sudden choking followed by persistent cough/wheeze/stridor, foreign body must be excluded even if CXR is normal
- Cough triggered by feeding, especially in neurologically impaired children [1][8]
- Investigation: Clinical feeding assessment and targeted instrumental swallow study when indicated; investigate reflux only when compatible features are present [18]
- Management: Individualised multidisciplinary feeding, positioning, texture and nutrition plan. Enteral access or antireflux surgery is selected for a demonstrated indication, not a generic next step for cough.
Causes of cough in children may be different from adults. Manifestations may be different from adults. A child with a cough may have a self-limiting problem or a serious illness. Importance of history and physical examination. All children with chronic cough should have thorough clinical review to identify possible underlying respiratory and/or systemic illness. Cough treatment should be based on aetiology. No evidence to support medicine for symptomatic relief. Importance of education. [1]
High Yield Summary
-
Most acute cough is viral and self-limiting
- Assess severity and trajectory. Look specifically for croup, pneumonia/bronchiolitis, asthma and sudden-onset foreign-body aspiration; do not order a routine “cough panel.”
-
Daily cough > 4 weeks is chronic
- Obtain a CXR and spirometry when age-capable, then investigate according to pointers. Daily wet cough suggests PBB or suppurative disease and is not simply “non-specific.”
-
Age matters
- Neonatal = congenital/aspiration/CF/PCD. Toddler = foreign body/bronchiolitis. Older child = asthma, infection, tic cough or less common structural disease.
-
Cough character matters
- Barking = croup/tracheomalacia. Whooping = pertussis. Staccato = Chlamydia. Daily wet = PBB/suppurative disease. A honking sound or absence in sleep alone does not diagnose tic or somatic cough.
-
Do NOT prescribe OTC cough medicines for young children.
- No evidence of benefit, significant risk of harm (respiratory depression, death). Treat the underlying cause.
-
Cough is protective.
- Suppressing it can be harmful. Educate families. The paediatrician is the child's advocate.
Active Recall - A Child with Cough
[1] Lecture slides: GC 141. A child with cough acute and chronic cough in children.pdf (all pages) [2] Lecture slides: Block C - A child with cough_ acute and chronic cough in children.pdf (p1) [3] Senior notes: MBBS Final MB (Pediatrics) (Felix PY Lai).pdf (p135, p137, p148, p153, p159) [4] Senior notes: Adrian Lui Pediatrics Notes.pdf (p156, p163) [5] Senior notes: Maksim Medicine Notes.pdf (p297) [6] Senior notes: Ryan Ho Respiratory.pdf (p18, p49, p50) [7] Senior notes: MBBS Final MB (Medicine) (Felix PY Lai).pdf (p109–p111) [8] Past papers: 2024 Fourth Summative MCQ.pdf (Q92, Q93) [9] CHEST Expert Panel. Managing Chronic Cough as a Symptom in Children and Management Algorithms. Chest. 2020. [10] European Respiratory Society. ERS guidelines on the diagnosis and treatment of chronic cough in adults and children. European Respiratory Journal. 2020. [11] NICE. Bronchiolitis in children: diagnosis and management (NG9). Updated 2021. [12] NICE. Pneumonia: diagnosis and management (NG250). 2025. [13] CDC. Influenza Antiviral Medications: Summary for Clinicians. Updated 2026. [14] US FDA. Should You Give Kids Medicine for Coughs and Colds?. [15] US FDA. Prescription opioid cough and cold medicines limited to adults 18 years and older. 2018. [16] CDC. Tuberculin Skin Testing: Information for Health Care Providers. [18] CHEST Expert Panel. Chronic Cough and Gastroesophageal Reflux in Children. Chest. 2019.
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