Poison ivy produces an oily sap called urushiol throughout the plant. Exposure to that oil causes an allergic reaction in about 85% of people. Urushiol is extremely durable and can remain on clothing, fur, or tools for long periods after initial exposure. If you’re exposed to it, wash thoroughly with cool water and a degreasing soap, then use rubbing alcohol and scrub under the fingernails with a brush, and wash all the exposed clothing. Poison ivy can also be extremely toxic if inhaled, so the plant should never be burned.
Poison ivy produces an oily sap called urushiol throughout the plant. Exposure to that oil causes an allergic reaction in about 85% of people. Urushiol is extremely durable and can…

