What are types of angioedema?

➢ Angioedemas can be divided into two categories according to their etiology: angioedema linked to substances released by mast cell degranulation and angioedema caused mainly by bradykinin ➢ Angioedema resulting from mast cell degranulation is typically associated with urticaria. These are angioedema whose origin is primarily allergic or anaphylactoid and probably a large part of idiopathic recurrent angioedema. ➢ Angioedema of which bradykinin is the main mediator are not associated with urticaria. These are angioedema linked to taking angiotensin-converting enzyme inhibitors (ACEI) or angiotensin II receptor antagonists, hereditary angioedema