Why Do I Wheeze When I Breathe Out?

Why Do I Wheeze When I Breathe Out? Wheezing happens when the airways are tightened, blocked, or inflamed, making a person’s breathing sound like whistling or squeaking. Common causes include a cold, asthma, allergies, or more serious conditions, such as chronic obstructive pulmonary disease (COPD). What does it mean when you wheeze while exhaling? Expiratory