What is the most common cause of an asthma exacerbation?

The most common cause of an asthma exacerbation is often attributed to upper respiratory infections. These infections can lead to inflammation of the airways, increased mucus production, and bronchial hyperreactivity, all of which can trigger an asthma attack. In particular, viral infections, such as those caused by rhinoviruses, are especially notorious for precipitating exacerbations in individuals with asthma. Evidence shows that even mild upper respiratory infections can exacerbate asthma symptoms, making it a significant concern in the management of the condition.

While environmental allergens, exercise-induced bronchospasm, and viral infections are also important considerations in asthma management and can lead to exacerbations, upper respiratory infections are recognized as the primary factor, especially in children and those with uncontrolled asthma. By addressing and managing upper respiratory infections effectively, individuals may experience improved asthma control and a reduction in exacerbations.