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Both poison ivy and poison oak can cause a red rash on the skin due to an allergic reaction to the chemical urushiol in their oily sap. I've heard people say that they are allergic to either one o...
Both poison ivy and poison oak can cause a red rash on the skin due to an allergic reaction to the chemical urushiol in their oily sap. I've heard people say that they are allergic to either one o...