Table 1 Common Causes and Classification of Angioedema
From: Angioedema
1. Allergic/anaphylaxis Foods, for example, peanuts, shellfish, milk, eggs, tree nuts Drugs, especially penicillin and sulfa drugs and their derivatives Venoms, stinging insects (bees, yellow jacket, hornet, wasp) and fire ants |
2. Associated with physical processes, for example, cold urticaria, cholinergic urticaria, vibratory angioedema, exercise-induced anaphylaxis |
3. Associated with chronic urticaria, either autoimmune or idiopathic |
4. Vasculitis, idiopathic urticarial vasculitis, and urticaria associated with connective tissue diseases |
5. Anaphylactoid, radiocontrast agents |
6. NSAID induced |
7. C1 INH deficiency (hereditary, acquired) |
8. ACE inhibitors |
9. Idiopathic angioedema |
   a. Histamine, dependent (histaminergic) |
   b. Histamine, independent (nonhistaminergic) |