What is a common symptom that may indicate an asthma exacerbation?

Wheezing or shortness of breath are classic and common symptoms indicative of an asthma exacerbation. During an exacerbation, the airways become inflamed and narrowed, leading to difficulty breathing and the characteristic wheezing sound. This reaction is often triggered by various factors such as allergens, respiratory infections, exercise, or irritants in the air. Recognizing these symptoms is crucial for timely management, as they may signal the need for increased medication or other interventions to prevent further respiratory compromise. The other options provided do not typically relate to asthma exacerbations and do not reflect the physiological changes that occur during an asthma attack.