What are poison ivy, oak, and sumac?
Poison ivy, poison oak, and poison sumac are plants that can cause a skin rash called allergic contact dermatitis upon contact. The red, uncomfortable, and itchy rash often shows in in lines or streaks and is marked by fluid-filled bumps (blisters) or large raised areas (hives). It is the most common skin problem caused by contact with plants. What causes the poison ivy rash? Urushiol is the chemical in poison ivy plants that causes the typical allergic reaction and symptoms of poison ivy rashes. Although it can sometimes be washed off within 10 minutes, after that, it is very likely to cause a reaction within 8 to 48 hours. Urushiol is found in the leaves, stems, and roots of poison ivy plants, which means that you can get a rash even in the winter, when a plant has lost all of its leaves. You can get the oil on your skin by: touching the poison ivy plant. touching any clothing, including shoes, that have come in contact with the plant. touching any gardening tools that may have the o
