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contact dermatitis
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contact dermatitis Red, patchy rash with raised areas on human skin, showing an allergic contact dermatitis reaction caused by exposure to poison ivy.
Why does poison ivy make people so itchy?
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contact dermatitis: Media

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Why does poison ivy make people so itchy?
Learn how the oil urushiol, secreted by poison ivy (Toxicodendron radicans),...
Video: © American Chemical Society (A Britannica Publishing Partner)

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contact dermatitis
Contact dermatitis caused by sensitivity to bandage adhesive surrounding a healing...
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allergy
An allergic contact dermatitis reaction caused by exposure to poison ivy.
© Joy Brown/Shutterstock.com