👃Wheezing is a high-pitched musical sound that occurs primarily during expiration due to narrowed airways, which is a hallmark of asthma exacerbations.

🔊This sound results from air being forced through constricted bronchioles, which is commonly seen in bronchospasm, inflammation, and mucus production associated with asthma.

🩺Pleural friction rub is a grating sound heard during both inspiration and expiration, typically seen in pleurisy, not asthma.

🌬️Fine rales are soft, crackling sounds heard on inspiration and are associated with fluid in the alveoli, such as in heart failure or pneumonia, rather than asthma.

🔊Rhonchi are low-pitched, coarse sounds often due to secretions in larger airways, seen in conditions like bronchitis, not typical of acute asthma.

📌Core message

Expiratory wheezing is the classic auscultatory finding in acute asthma due to bronchoconstriction and airway inflammation.