Poison Ivy Vs Poison Oak Rash. The reason poison sumac is considered the most poisonous is its commonness around the world, as well as how easy it is to make contact with it due to its many leaves per stem. Here's how to tell the difference between poison ivy, poison oak, and poison sumac, and what to do if you get a rash from one of these plants.
Talk to your doctor if you have a severe poison ivy rash or if the rash involves your face or genital area. But this vine is crossing right over a poison ivy vine that has two three-leaflet leaves on it. Poison ivy or poison oak is a shrub found in most of the regions of North America.
However, it can also form on parts of the body not contacted by the plant.
Poison ivy, poison oak, and poison sumac can causes an allergic reaction when someone comes in contact with the plant's oils.
Poison ivy contains a chemical called urushiol that causes an itchy rash. Poison ivy, poison oak, and poison sumac are a hazard year-round. Obviously, you can get poison ivy by touching the plant directly, but you can also get it by touching something else that came into contact with it — like your dog.