Which of the following is a key symptom of Asthma?

A key symptom of asthma is a chronic cough, particularly when it is persistent and occurs more frequently at night or after physical activity. This cough is often caused by the inflammation and narrowing of the airways, which is characteristic of asthma. It can be dry or may produce sputum, and it reflects the underlying airway hyperresponsiveness associated with the condition.

Chronic cough serves as a way for the body to clear irritants from the airways and is often exacerbated by triggers such as exercise, allergens, or respiratory infections. Understanding this symptom is crucial for recognizing and managing asthma effectively.

In contrast, while chest pain and a racing heartbeat can occur in various medical conditions, they are not hallmark signs of asthma. Sudden weight loss typically relates to different issues entirely and is not considered a symptom of asthma. Thus, recognizing chronic cough as a prominent symptom is essential for proper diagnosis and management of asthma.