Question

poison ivy produces a skin irritant known as urushiol which can cause an allergic reaction like an itchy rash on the exposed skin.

Answer 1

Chances are, that rash wascaused by brushing against a common plant, such as poison ivy. But there are many other plants that can cause contact dermatitis — skin inflammationcause by an irritant or a substance that produces anallergic reaction — or shorter-lived burning oritching.