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Diagnosis of Poison Ivy, Poison Oak, and Poison Sumac

Diagnosis of poison ivy, poison oak, or poison sumac often is made on the basis of physical examination. In most cases, recent exposure to the poisonous plant, followed by observance of the characteristic rash is enough to make a definitive diagnosis.


Because poisonous plants can cause symptoms that are similar to other dermatologic conditions, a physician should be consulted. Physicians examine the area(s) of the body affected by t...Read the full article