Which of the following is a common symptom of obstructive lung diseases?

Obstructive lung diseases, such as chronic obstructive pulmonary disease (COPD) and asthma, are characterized by a narrowing of the airways, which makes it difficult for air to flow in and out of the lungs. Shortness of breath during exertion is a hallmark symptom due to the increased work required for breathing when the airways are obstructed. Patients may also experience frequent chest infections, as the impaired airflow can lead to stagnant secretions in the lungs, creating an environment more conducive to infection. Additionally, a productive cough with thick mucus is prevalent in these conditions, as patients often attempt to expel mucus that accumulates due to inflammation and airway narrowing.

The combination of these symptoms—shortness of breath during exertion, frequent chest infections, and a productive cough with thick mucus—highlights the complexity of obstructive lung diseases and confirms that all of these symptoms can occur together frequently in affected individuals. This comprehensive nature of symptoms leads to the conclusion that they coexist, demonstrating the multifaceted impact of obstructive lung conditions on a patient's respiratory health.