Poison ivy oil can spread quickly and easily (just like poison oak does). Poison ivy rash can spread from clothes, skin ...

Poison oak rash is an allergic reaction to the leaves ... depending on the time of year. Like poison ivy and poison sumac, poison oak releases an oil called urushiol when it sustains damage.

Medically reviewed by Susan Bard, MD An itchy rash with blisters can be caused by an allergic reaction; an autoimmune ...

Poison sumac rash symptoms Poison sumac works the same way as poison ivy and poison oak — all three plants contain an oil called urushiol that causes an allergic reaction in most people.

When you’re spending time outdoors this summer, in your own yard or hiking in a park, it’s useful to know to spot poison ivy.