Poison ivy has three leaves, and the middle leaf has a longer stem. Touching poison ivy causes an allergic reaction due to urushiol oil. Poison oak and poison sumac are related to poison ivy and also ...
Just thinking about poison ivy can make you itch. Blistering rashes on your arms and ankles, oozing bumps between your fingers and eyelid-swelling exposures are all-too-familiar summer hazards. Poison ...
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