Poison Ivy Skin Rash. A poison ivy rash will only develop on skin that comes into contact with the plant's oils. Poison ivy, poison oak and poison sumac all have an oily resin throughout the plant that can create an allergic reaction that lasts for weeks.
A poison ivy rash will only develop on skin that comes into contact with the plant's oils. To treat a mild rash and help stop the itch, dermatologists recommend the following: To treat the rash. That ingredient is called urushiol, and it causes a rash when.
You can treat the rash at home if you: Have a mild rash.
Immediately rinse your skin with lukewarm, soapy water.
Poison ivy, poison oak, and poison sumac are all known to cause an itchy rash. A poison ivy rash usually resolves on its own within a few weeks. Poison ivy and poison oak are two other commonly known poisonous plants that can cause a rash, but they look different from poison sumac.