What is the main cause of COPD?

What is the main cause of COPD?

• A. Cigarette smoking
• B. Air pollution
• C. Genetic predisposition
• D. Viral infections in childhood

Answer: (A)

Long-term exposure to lung irritants, especially cigarette smoke, drives the development of COPD. The chemicals in tobacco smoke trigger chronic inflammation in the airways and lung tissue, leading to thickened walls, increased mucus, narrowed airways, and damage to the alveolar walls. Over years, this progressive damage causes irreversible airflow limitation and symptoms like breathlessness and chronic cough. While air pollution and some genetic conditions (like alpha-1 antitrypsin deficiency) can contribute, cigarette smoking remains the leading cause in most populations. Childhood viral infections do not cause COPD by themselves; COPD results from sustained exposure and ongoing inflammatory damage over time.

Long-term exposure to lung irritants, especially cigarette smoke, drives the development of COPD. The chemicals in tobacco smoke trigger chronic inflammation in the airways and lung tissue, leading to thickened walls, increased mucus, narrowed airways, and damage to the alveolar walls. Over years, this progressive damage causes irreversible airflow limitation and symptoms like breathlessness and chronic cough. While air pollution and some genetic conditions (like alpha-1 antitrypsin deficiency) can contribute, cigarette smoking remains the leading cause in most populations. Childhood viral infections do not cause COPD by themselves; COPD results from sustained exposure and ongoing inflammatory damage over time.