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Signs and Symptoms

Direct contact with poisonous plant for the first time causes sensitivity. In most cases, this exposure does not produce a reaction. Sensitivity to poison ivy varies from person to person. In some people, subsequent exposure results in a skin rash that develops within 12–48 hours.

Symptoms can be mild, moderate, or severe and include itching, redness (erythema), and blisters. The rash often is linear (i.e., appears in a line where the leaves of the plant have touch...Read the full article