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Habitual cough

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Habitual Cough

Habitual cough, now termed tic cough or somatic cough disorder (depending on clinical presentation), is a chronic cough that persists without evidence of underlying organic airway disease. It's most common in children and adolescents but occurs across all ages.

Definition & Terminology

Recent expert panels have recommended updated terminology:
  • Tic cough (formerly "habit cough"): A voluntary or semi-voluntary cough that shares features with tic disorders, including suppressibility, distractibility, suggestibility, and a premonitory urge or sensation before the cough occurs.
  • Somatic cough disorder (formerly "psychogenic cough"): A chronic cough where psychological distress is expressed as a physical symptom, classified within DSM-5 somatization disorders.
Both conditions are diagnosed only after excluding organic causes and other tic disorders.

Clinical Characteristics

Classic features include:
  • Throat-clearing noise quality (rather than productive cough)
  • Reduction or cessation during sleep or with distraction
  • Suppressibility—the patient can voluntarily control or delay the cough
  • Highly variable presentation
  • Premonitory sensation or urge (especially in tic cough)
  • Disruptive social impact
The cough is often described as a nervous habit or anxiety-related behavior. Psychological stress may worsen it, though an underlying pulmonary disorder may also be present.

Associated Conditions

Habitual/tic cough is frequently associated with:
  • ADHD
  • Other tic disorders
  • Anxiety and phobias
  • Depressive illness
  • History of early trauma or abuse

Differential Diagnosis

The diagnosis requires exclusion of:
  • Respiratory infections
  • Asthma and COPD
  • Gastroesophageal reflux disease (GERD)
  • Postnasal drip and allergic rhinitis
  • ACE inhibitors or other medications
  • Cardiac causes (e.g., heart failure)
  • Lung cancer or other malignancy (in appropriate clinical context)
A careful history alone leads to the correct diagnosis in approximately 70% of chronic cough cases. Notably, patients initially labeled as having "psychogenic" cough often have one of the common organic causes upon careful re-evaluation.

Management

Behavioral and psychological interventions are most effective:
  • Hypnosis and suggestion therapy are the most successful treatment modalities, particularly in children.
  • Speech pathology and cough suppression therapy (breathing exercises, vocal hygiene, laryngeal control techniques)
  • Behavioral modification and cognitive-behavioral therapy
  • Reassurance and education about the benign nature of the condition
For somatic cough disorder, psychotherapy and treatment of any underlying psychiatric conditions (anxiety, depression) are important.

Key Point

Even when chronic cough has an identifiable pulmonary cause, behavioral modification may be effective if an exaggerated cough response or habitual component is present. The diagnosis should only be made after thorough exclusion of organic disease—Murray & Nadel's Textbook of Respiratory Medicine, p. 394
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