Urticaria (hives) & angioedema

Etiology

  • 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

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