Poison Ivy On Skin. Poison ivy grows as a shrub or vine in woods, fields, and areas of thick underbrush. These unassuming plants can cause problems on your skin.
Poison ivy, poison oak and poison sumac all have an oily resin throughout the plant that can create an allergic reaction that lasts for weeks. Touching any part of the poison ivy plant can cause red, swollen skin, blisters and severe itching, sometimes within hours after exposure. You can get poison ivy rashes if you contact the plant itself or just the oil.
Psoriasis is a chronic autoimmune disorder.
Poison Ivy plants also grow berries, which are just as toxic as the rest of the plant.
There are two types of poison ivy plant as Western poison ivy (Toxicodendron rydbergii) and Eastern poison ivy (Toxicodendron radicans). Poison ivy grows as a shrub or vine in woods, fields, and areas of thick underbrush. A poison ivy rash is the result of exposure to an oily resin known as urushiol.