Poison ivy refers to a class of plants that produce urushiol, an oil known to cause an allergic reaction. While not everyone is allergic to this oil, some people are highly allergic to urushiol and develop a contact rash when they’re exposed to it.
Poison ivy plants have a grouping of three leaves (hence the saying, “Leaves of three, leave them be!”). Yet, this oil also exists on poison oak and poison sumac, which vary in appearance. While avoidi... Read moreabout Poison Ivy









