What is poison ivy? What is a poison ivy rash?

Poison ivy is a plant well known for causing severe inflammation of the skin, also known as contact dermatitis. The plant contains a sap which causes instant irritation if it comes in contact with the skin. Poison ivy is native to North America, where it mainly grows in clusters on the edges of woodland - where there is sufficient sunlight for it to grow. The plant is characterized by clusters of three leaflets, which can range from light green to dark green, each growing on its own stem, connected to a main vine (without any thorns)... via Health News from Medical News Today Read More Here..