What is urushiol primarily known for?

Urushiol is primarily known for causing allergic skin rashes, particularly in individuals who come into contact with plants like poison ivy, poison oak, and poison sumac. This oily organic compound is a potent allergen that can trigger an immune response, leading to symptoms such as redness, itching, and blistering of the skin. The reaction occurs in people who have been previously sensitized to urushiol, meaning their immune system has recognized it as a threat, which can cause a more severe reaction upon subsequent exposure. Understanding urushiol's role in allergic reactions is important for preventing and managing contact dermatitis resulting from exposure to these plants.