Poison ivy rash
Overview Poison ivy rash Poison ivy rash on arm Poison ivy rash is caused by an allergic reaction to an oily resin called urushiol (u-ROO-she-ol). This oily resin is in…
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Overview Poison ivy rash Poison ivy rash on arm Poison ivy rash is caused by an allergic reaction to an oily resin called urushiol (u-ROO-she-ol). This oily resin is in…