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Quenshaw’s Cough

What is Quenshaw’s cough?

Quenshaw’s cough, also spelled “Quenshaw cough,” is a paroxysmal, dry cough that occurs primarily during inspiration and is most often heard in children with a recent viral upper‑respiratory infection. The term was first described by British pediatrician Dr. James Quenshaw in the 1950s when he noted a distinct cough that worsened after a bout of croup or bronchiolitis. Unlike a typical cough that is triggered by irritation of the lower airway, Quenshaw’s cough originates in the upper airway (pharynx and larynx) and is thought to be a reflex response to residual inflammation or edema after the infection has begun to resolve.

Although the cough is usually self‑limiting, it can be distressing for the child and parents because it may persist for several weeks and can interfere with sleep. Recognizing the characteristic pattern helps clinicians differentiate it from more serious conditions such as asthma, pertussis, or foreign‑body aspiration.

Common Causes

The cough is rarely a disease in itself; it is a symptom that arises from a variety of underlying conditions, most of which are common in young children.

• Post‑viral croup (laryngotracheobronchitis) – inflammation of the larynx and trachea after a viral infection.
• Bronchiolitis – usually caused by respiratory syncytial virus (RSV) and characterized by wheezing and cough.
• Upper respiratory tract infection (URTI) – the most frequent trigger, especially rhinovirus, adenovirus, or influenza.
• Viral laryngitis – isolated inflammation of the vocal cords leading to a harsh, inspiratory cough.
• Pertussis (whooping cough) – may mimic Quenshaw’s cough early in the disease but typically evolves to a “whoop.”
• Allergic rhinitis – post‑nasal drip can irritate the throat and produce a dry cough.
• Gastro‑esophageal reflux disease (GERD) – acid reaching the upper airway can trigger a reflex cough.
• Environmental irritants – tobacco smoke, dust, or strong odors can aggravate a sensitive airway.
• Post‑intubation or post‑surgical airway irritation – especially after procedures involving the neck or throat.
• Rare causes – congenital anomalies (e.g., laryngeal cleft) or neuromuscular disorders that affect airway protection.

Associated Symptoms

Quenshaw’s cough does not usually occur in isolation. The following signs are frequently reported alongside the cough:

• Low‑grade fever (often < 100.4°F/38°C) that subsides within a few days.
• Hoarseness or a “barky” quality to the voice.
• Scratchy sensation in the throat, especially after crying or exertion.
• Runny nose or mild nasal congestion.
• Occasional wheezing that improves with bronchodilator use (if underlying asthma is present).
• Sleep disturbance – the cough often worsens at night when the child is lying down.
• Decreased appetite or mild irritability due to discomfort.

When to See a Doctor

Because most cases are benign, many parents monitor the cough at home. However, medical evaluation is needed if any of the following occur:

• The cough persists longer than 3 weeks without improvement.
• High fever (>101.5°F / 38.6°C) that lasts more than 48 hours.
• Difficulty breathing, rapid breathing (≥ 60 breaths/min in infants), or chest retractions.
• Wheezing that does not respond to a trial of a bronchodilator.
• Blood or green‑yellow sputum.
• Unexplained weight loss or failure to thrive.
• Recent exposure to pertussis or a known outbreak.
• Any sign of a foreign‑body aspiration (sudden cough after choking).

Diagnosis

Diagnosis is largely clinical, based on a careful history and physical examination. The typical steps include:

1. History taking – onset after a viral illness, cough that is inspiratory and paroxysmal, absence of a classic “whoop.”
2. Physical exam – listen for stridor, wheeze, or crackles; assess for signs of respiratory distress.
3. Pulse oximetry – ensures oxygen saturation is > 95% in room air.
4. Chest X‑ray – rarely needed, but may be ordered if pneumonia, foreign body, or cardiac cause is suspected.
5. Laboratory tests – a nasopharyngeal swab for RSV, influenza, or pertussis if indicated.
6. Trial of therapy – a short course of inhaled bronchodilator or oral corticosteroid can help differentiate from asthma.

When the cough fits the classic “post‑viral inspiratory” pattern and no red flags are present, a specific diagnostic label (“Quenshaw’s cough”) may be documented, and reassurance is the mainstay of care.

Treatment Options

Because the cough is usually self‑limited, treatment focuses on symptom relief and supporting airway healing.

Medical Interventions

• Humidified air – a cool‑mist humidifier in the child’s bedroom can lessen throat irritation.
• Short‑acting bronchodilators (e.g., albuterol) – useful if a component of bronchospasm is present.
• Oral corticosteroids – a brief (<5‑day) course of prednisone may be considered for severe inflammation, though evidence is modest.
• Antibiotics – only indicated if a bacterial infection is confirmed (e.g., pertussis, pneumonia).
• Antihistamines or intranasal steroids – for children with concurrent allergic rhinitis.
• Proton‑pump inhibitors – reserved for documented GERD after specialist evaluation.

Home & Supportive Care

• Maintain adequate hydration – warm fluids (chicken broth, diluted fruit juice) soothe the throat.
• Elevate the head of the sleeping area slightly to reduce nighttime coughing.
• Avoid exposure to tobacco smoke, strong perfumes, or other irritants.
• Use saline nasal drops or a nasal suction device to clear mucus that may trigger cough.
• Offer honey (≥ 1 year of age) ½–1 teaspoon before bedtime; honey’s viscous coating can calm the throat.
• Limit vigorous physical activity for a few days if coughing worsens with exertion.

Prevention Tips

While a post‑viral cough cannot always be prevented, the following strategies reduce the likelihood of severe airway irritation:

• Ensure children receive recommended vaccinations (influenza, RSV prophylaxis for high‑risk infants, DTaP).
• Practice good hand hygiene and avoid close contact with individuals who have active respiratory infections.
• Keep indoor air clean: use HEPA filters, keep humidity between 30‑50%.
• Discourage smoking around children; create a smoke‑free home.
• Promptly treat allergic rhinitis with intranasal steroids or antihistamines.
• Manage GERD symptoms with diet modification (avoid citrus, chocolate, caffeine) and appropriate medical therapy.
• Encourage regular pediatric check‑ups so that chronic conditions (e.g., asthma) are identified early.

Emergency Warning Signs

References

• Mayo Clinic. “Cough.” Accessed June 2024. https://www.mayoclinic.org
• Centers for Disease Control and Prevention. “Pertussis (Whooping Cough).” 2024. https://www.cdc.gov
• National Institute of Allergy and Infectious Diseases. “Respiratory Syncytial Virus (RSV).” 2024. https://www.niaid.nih.gov
• World Health Organization. “Global Guidelines for the Management of Acute Cough in Children.” 2023.
• Cleveland Clinic. “Croup (Laryngotracheobronchitis).” 2024. https://my.clevelandclinic.org
• American Academy of Pediatrics. “Management of Acute Viral Bronchiolitis.” Pediatrics, 2022; 149(6):e2022058763.

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