The medical term for this condition is black-spot poison-ivy dermatitis. It takes time for the rash to appear. A rash can develop in a few hours if you’ve had a rash from one of these plants before.

Poison ivy rash can spread from clothes ... This might take longer, but if you spray it with concentrated industrial vinegar, ...

But did you know that the plants poison ivy, poison oak, and poison sumac all contain the same rash-causing substance? It's called urushiol (pronounced: yoo-ROO-shee-ol), a colorless, odorless oil ...

Leaves of three — let them be! You've probably heard that little rhyme about poison ivy, the plant that can cause an itchy rash. But do you know why? It's because of urushiol (say: yoo-ROO-shee-ol), a ...

Source: Focus Medica. A condition in which skin rashes develop on the body when contacted with a plant called poison ivy. Caused by the sap of plants containing irritant called urushiol.

As more people venture outside to enjoy warm weather, knowing how to identify and avoid poison oak could help to avoid a future of headaches and itchy red rashes ... with poison ivy, but the ...