What is intrinsic/extrinsic asthma?
Intrinsic and extrinsic asthma are outdated terms which have now been replaced by terms related to the asthma trigger, since the inflammatory response of the airways is the same independent of the cause of the asthma. What was known as extrinsic asthma is now called allergic asthma, while asthma triggered by non-allergic factors, formerly called intrinsic asthma, is separated into such categories as exercise-induced asthma and occupational (chemical- induced) asthma.
