Allergic reactions Health Article

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Illustrations
Allergic reactions
Allergic reaction is a sensitivity to a specific substance, called an allergen, that is contacted through the skin, inhaled into the lungs, swallowed or injected. The body's reaction to an allergen can be mild, such as a localized rash, or life-threatening, such as anaphylactic shock. Update Date:
04/28/2008
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Stuart I. Henochowicz, MD, FACP, Associate Clinical Professor of Medicine, Division of Allergy, Immunology, and Rheumatology, Georgetown University Medical School. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

Dermatographism - close-up

Dermatographism on the arm

Hives (urticaria) on the arm

Hives (urticaria) on the chest

Hives (urticaria) - close-up

Hives (urticaria) on the trunk

Dermatographism on the back

Dermatographism - arm

Allergic reactions

Allergic reactions

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