Urticaria classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Classification

• Spontaneous urticaria
  • Acute urticaria: Spontaneous appearance of wheals, most days in a period less than 6 weeks
  • Chronic urticaria: Spontaneous appearance of wheals with more than 6 weeks duration
    • Chronic continuous: Involvement in every days or most days
    • Chronic recurrent: There are symptom free intervals

• Physical urticaria
  • Dermographic urticaria: Appearance of wheals 1-5 minutes after a mechanical shearing force
  • Delayed pressure urticaria: Appearance of wheals 3-8 hours after a vertical pressure
  • Cold contact urticaria: Appearance of wheals due to cold temperature, such as ice and cold air, water or wind)
  • Heat contact urticaria
  • Solar urticaria: Appearance of wheals due to sunlight/ultraviolet light
  • Vibratory urticaria: Appearance of wheals due to vibratory forces, such as pneumatic hammer

• Cholinergic urticaria: Usually due presents due to exercise or after a hot shower

• Adrenergic urticaria

• Aquagenic urticaria

• Contact urticaria (allergic or pseudoallergic)

• Drug-induced urticaria