How Long Does Poison Ivy Last?

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Poison ivy rash is allergic contact dermatitis caused by a substance called urushiol, found in the sap of poison ivy. This same substance can be found in other plants as well, notably poison oak, and poison sumac.

Urushiol is a colorless, or slightly yellow oil that oozes from any cut, or crushed, part of the plant, including both stem and leaves. Simply brushing against a plant may not cause a reaction. On the other hand, you may develop dermatitis without ever coming into contact with poison...

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Is This Rash Poison Ivy?

Poisonplants

Know What Poison Ivy Looks Like Poison Ivy and Poison Oak have three leaflets with a longer middle leaf. Remember the saying, "When in three, let it be." Poison Ivy can grow as a vine or low shrub. Poison sumac can grow as a large bush or small...