What is the primary symptom of asthma?

The primary symptom of asthma is shortness of breath, particularly during exertion or in response to triggers such as allergens or irritants. Asthma is characterized by inflammation and narrowing of the airways, leading to difficulty in breathing. Although excess mucus production can be associated with asthma, it is not the hallmark symptom. Instead, the most commonly reported experience during an asthma episode is a feeling of breathlessness or tightness in the chest, which can occur during physical activity or stress.

A rapid heartbeat may occur as a secondary response to a lack of oxygen or anxiety, and abdominal pain is not typically associated with asthma itself. Therefore, understanding that shortness of breath is the defining symptom helps to clarify the condition and its management effectively.