AllRefer Health - Dermatographism on the Arm (Pictures, Images, Photos, Diagrams, & Illustrations)

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Dermatographism on the Arm

Dermatographism is a condition where lightly scratching the skin raises wheals or welts. Histamine is released at the site, causing the small blood vessels (capillaries) to dilate, producing redness and localized swelling.

• Allergic Reactions
• Urticaria Pigmentosa

Review Date : 1/1/1997
Reviewed By : Mosby Publishing Company

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