We may receive a commission on purchases made from links. Urushiol -- a sticky oil produced by poison ivy, poison oak, and poison sumac plants -- causes nasty allergic reactions in about 85% of the ...

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 ...