Urticaria (Hives) & Angioedema

Arthropod bites (insect bites)
Drugs (nonallergic), eg, codeine, morphine
Physical factors: heat, cold, solar, pressure, water, vibratory
Cholinergic urticaria: exercise, excitement, hot showers
Drugs (allergic): penicillin, aspirin
Other allergic causes: feathers, dander, shellfish, tomatoes, strawberries, vaccines, chemicals, cosmetics
Infection, eg, otitis media, sinusitis, hepatitis
Serum sickness
Angioedema: complement-mediated (hereditary or acquired), ACE inhibitors