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==Classification==
==Classification==
*Acute urticaria  
*Spontaneous urticaria
*Chronic urticaria  
**Acute urticaria: Spontaneous appearance of wheals, most days in a period less than 6 weeks
*Drug-induced urticaria
**Chronic urticaria: Spontaneous appearance of wheals with more than 6 weeks duration
*Physical urticarias are often categorized into the following.
***Chronic continuous: Involvement in every days or most days
**[[Water urticaria|Aquagenic:]] Reaction to water (rare)
***Chronic recurrent: There are symptom free intervals
**[[Cholinergic urticaria|Cholinergic]]: Reaction to body heat, such as when [[Exercise urticaria|exercising]] or after a hot shower
 
**Cold ([[Chronic cold urticaria]]): Reaction to cold, such as ice, cold air or water
*Physical urticaria
**Delayed Pressure: Reaction to standing for long periods, bra-straps, panty or thong bands, belts
**Dermographic urticaria: Appearance of wheals 1-5 minutes after a mechanical shearing force
**[[Dermatographic urticaria|Dermatographic]]: Reaction when skin is scratched (very common)
**Delayed pressure urticaria: Appearance of wheals 3-8 hours after a vertical pressure
**Heat: Reaction to hot food or objects (rare)
**Cold contact urticaria: Appearance of wheals due to cold temperature, such as ice and cold air, water or wind)
**Solar: Reaction to direct sunlight (rare)
**Heat contact urticaria
**Vibration: Reaction to vibration (rare)
**Solar urticaria: Appearance of wheals due to sunlight/ultraviolet light
**Adrenergic: Reaction to adrenaline / noradrenaline (extremely rare)
**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


==References==
==References==

Revision as of 07:49, 3 December 2020

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

Overview

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

References

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