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    Home - Health & Wellness (Specialized) - Poison Ivy Symptoms
    Health & Wellness (Specialized)

    Poison Ivy Symptoms

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    Poison Ivy Symptoms
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    Poison ivy contains an oily resin known as urushiol. It’s colorless and odorless, and is found in the leaves, stems, and roots of the plant.

    This oily substance easily sticks to many different types of surfaces when it comes into contact with them, including skin, clothing, pet fur, and outdoor tools and equipment.

    If the oil comes into contact with an object and isn’t washed off afterward, it’s possible to have a skin reaction after touching that object — even years later.

    “If you get it on your shoelace, then you tie your shoe and you wipe your forehead, you could have poison ivy on your forehead,” says Linda Radimecky, an interpretive naturalist at Afton State Park in Hastings, Minnesota.

    When the oil from poison ivy touches your skin, it bonds to the area and causes a reaction from your body’s own immune system. This reaction is known as allergic contact dermatitis.

    About 85 percent of people in the U.S. may have an allergic reaction to poison ivy, with 10 to 15 percent susceptible to a severe reaction.

    No one is born allergic to poison ivy, though.

    “Our bodies become sensitized to poison ivy after an initial exposure,” says Joshua Zeichner, MD, director of cosmetic and clinical research in dermatology at Mount Sinai Hospital in New York City. “Upon future exposure, our immune system becomes activated, leading to significant inflammation.”

    In addition to direct contact and touching contaminated items, you can also have a poison ivy reaction by breathing smoke from the plant if it’s burned.

    Poison ivy isn’t contagious unless there is still oil from the plant on your skin and you spread it to other surfaces. You also can’t spread a rash across your body by scratching once you’ve washed off the oil.

    If a skin rash appears to spread, it’s probably because the area was already exposed and it’s experiencing a delayed reaction. You also may have oil from the plant under your fingernails or have unknowingly touched a contaminated item.



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