Intrinsic (nonallergic) and extrinsic (allergic) asthma are subtypes of asthma that have similar symptoms but different triggers. Learn more about their differences, causes, and treatments here.
Intrinsic (nonallergic) and extrinsic (allergic) asthma are subtypes of asthma that have similar symptoms but different triggers. Learn more about their differences, causes, and treatments here.