Bronchoconstriction

COPD
Asthma

Bronchiolitis (peds)

Wheezing differential
- Intrathoracic lower airway
  - Aspirated foreign body
  - Bronchiectasis
  - Bronchiolitis
  - Bronchiolitis obliterans
  - Cardiac asthma/CHF
  - Carcinoid tumors
  - Environmental - silo farmers
  - Parasitic in endemic
  - Reactive airway
- Intrathoracic central airway
  - Foreign body
  - Tracheal stenosis/tumors
  - Tracheomalacia
  - Mucus plugs
  - Vascular rings/aneurysms
  - Mediastinal mass
- Extrathoracic
  - Foreign body
  - Anaphylaxis
  - Vocal cord edema/paralysis
  - Paradoxical vocal cord motion
  - Laryngeal stenosis
  - Tonsillar hypertrophy
  - Goiter
  - Postnasal drip

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