Poison ivy is a type of allergenic plant in the genus Toxicodendron native to Asia and North America. Formerly considered a single species, Toxicodendron radicans, poison ivies are now generally …

May 7, 2020 · We'll show you how to identify poison ivy during the spring, summer, fall, and winter.

Dec 15, 2025 · Poison ivy, poison oak, and poison sumac are among the most common causes of contact dermatitis in the U.S. See pictures of what a poison ivy rash looks like and find out how to …

May 15, 2024 · Poison ivy rash is caused by an allergic reaction to an oily resin called urushiol (u-ROO-she-ol). This oil is in the leaves, stems and roots of poison ivy, poison oak and poison sumac. Wash …

Oct 25, 2025 · Poison ivy, poison oak, and poison sumac are allergenic plants with an oil called urushiol. This oil typically causes an itchy, inflamed rash.

Poison ivy is a common poisonous plant that causes an itchy skin rash. Other rash-inducing poisonous plants include poison oak and poison sumac.

If you are having a severe reaction to poison ivy or have questions about an exposure, get help online with the web POISON CONTROL tool or call 1-800-222-1222. Both options are free for the public, …

Dec 9, 2025 · Care guide for Poison Ivy. Includes: possible causes, signs and symptoms, standard treatment options and means of care and support.

Poison ivy is an allergic contact dermatitis that causes a very itchy rash caused by exposure to the oil urushiol, which coats the leaves of poison ivy plants.

Poison ivy, poison oak, and poison sumac are a hazard year-round. Here are tips for preventing and treating the itchy rash and blisters.