Certified Respiratory Therapist Practice Exam

The most common cause of chronic cough in adults is post-nasal drip. Post-nasal drip occurs when excess mucus accumulates in the back of the throat and can be a result of various conditions, such as allergies, sinus infections, or rhinitis. This accumulation leads to irritation and triggers the cough reflex as the body attempts to clear the mucus from the airway.

Understanding the prevalence of post-nasal drip is important, as it is often overlooked or misdiagnosed. Chronic cough can significantly impact a person's quality of life, and recognizing post-nasal drip as a common underlying cause allows for more effective diagnosis and treatment. Treatment may involve addressing the underlying cause of the mucus production, such as allergy management or nasal saline irrigation, which can relieve the cough.

While conditions such as bronchitis, gastroesophageal reflux disease (GERD), and smoking can also cause chronic cough, they do not occur as frequently as post-nasal drip in the adult population. Identifying post-nasal drip as a primary contributor allows healthcare providers to focus on appropriate interventions and provide relief for individuals suffering from chronic cough.