rough

classification

with or without urticaria with comes down to chronic vs acute without some down to AAE and HAE AAE might be: NSAID, ACEi HAE has its own classifaciotns into type I II and III with their own epid, ie. II is 15, I is 85%, and III is something?

this is the old way of classication but if you look at the new DANCE criteria it is a bit different

Pathophys

Depends but the old school thought is bradykinin mediated vs histmaine mediated where pro bradykinin can happenw tih c1est def vs something else (ie impaired degration with ACEi)

triggers possible can vary