Are there varying degrees of asthma?

Extrinsic vs intrins: Extrinsic asthma occur to to external factors, intrinsic is due to medications and other factors the body is not able to deal with causing asthma, there is also excercise induced, work related - due to dust and molds.

Yes: Very true- some asthma is so mild that inhaler use is only seasonal while other patients may have severe disease and har to use insulted every single day.