What is a common sign of severe asthma exacerbation?

A common sign of severe asthma exacerbation is a silent chest. This phenomenon occurs when the airflow in and out of the lungs is so severely restricted that wheezing, which is typically heard during normal asthma exacerbations, is no longer present. In the context of a significant asthma attack, the ability to expel air becomes compromised to the point that the sound of wheezing diminishes or disappears altogether, indicating very limited air movement and a critical state.

This silent chest signifies that the patient's condition may be deteriorating, as it often means they are in respiratory distress with inadequate ventilation. The lack of audible wheezing suggests that there is severe bronchoconstriction, and the body is not able to move air effectively, which is a medical emergency requiring immediate intervention.