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What causes physical urticaria?

ANSWER

Physical urticaria refers to hives caused by direct physical stimulation of the skin -- for example, cold, heat, sunlight, vibration, pressure, sweating, and exercise. They usually happen right where the skin was affected and rarely appear anywhere else. Most appear within 1 hour after exposure.

SOURCES: 

Medscape: "Angioedema." 

MedicineNet: "Hives (Uticaria & Angioedema)."

American Academy of Dermatology: "Hives."

Muller, B. March 2004. American Family Physician,


 

Reviewed by Stephanie S. Gardner on October 13, 2017

SOURCES: 

Medscape: "Angioedema." 

MedicineNet: "Hives (Uticaria & Angioedema)."

American Academy of Dermatology: "Hives."

Muller, B. March 2004. American Family Physician,


 

Reviewed by Stephanie S. Gardner on October 13, 2017

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What causes dermatographism?

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