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urushiol
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Videos
Why does poison ivy make people so itchy?
Why scratching an itch actually makes it worse
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Videos

Why does poison ivy make people so itchy?
Learn how the oil urushiol, secreted by poison ivy (Toxicodendron radicans),...
Video: Β© American Chemical Society (A Britannica Publishing Partner)
Why scratching an itch actually makes it worse
Understanding the chemical process of itching and why scratching is futile.
Video: Β© American Chemical Society (A Britannica Publishing Partner)