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You are here : AllRefer.com > Health > Injuries & Wounds > Allergic Reactions > Pictures & Images: Dermatographism on the Arm

Allergic Reactions

Pictures & Images

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.

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• Definition
• Allergic Reactions: Overview & Considerations
• Allergic Reactions: Causes
• Allergic Reactions: Symptoms & Signs
• Allergic Reactions: Prevention
• Allergic Reactions: First Aid
• Allergic Reactions: Do Not
• Call Immediately for Emergency Medical Assistance if
• Pictures & Images

Main Page of Allergic Reactions

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