What symptom is most frequently associated with nocturnal asthma?

Wheezing is the symptom most frequently associated with nocturnal asthma due to its relationship with airway obstruction and inflammation, which are hallmark features of asthma. During the night, individuals with asthma may experience exacerbation of their symptoms, often triggered by various factors such as lying flat, increased mucus production, or changes in temperature and humidity. The airway constriction leads to a reduced airflow and results in the characteristic wheezing sound upon breathing.

Nocturnal asthma attacks can also be influenced by specific triggers such as allergens or irritants present in the bedroom environment, further aggravating wheezing. Other common symptoms of asthma, such as dyspnea (shortness of breath), can accompany these episodes, but wheezing remains the key audio-visual marker of airway obstruction in asthma patients, especially during the night.