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Dermatographism - c...	Dermatographism on ...	Hives (urticaria) o...
Hives (urticaria) o...	Hives (urticaria) -...	Hives (urticaria) o...
Dermatographism on ...	Dermatographism - a...	Allergic reactions
Allergic reactions

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Dermatographism - close-up

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

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Definition Considerations Causes Symptoms First Aid Do Not Call immediately for emergency medical assistance if Prevention References

Related Learning
Centers

·As a Cause

Contact Dermatitis

Giant Hives

Hives

Pulmonary Eosinophilia

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