Poison Ivy Under Skin. Here are tips for preventing and treating the itchy rash and blisters. Outsmarting Poison Ivy and Other Poisonous Plants.
This rash, known as contact dermatitis or rhus dermatitis, is actually. A rash from poison ivy, oak, or sumac looks like patches or streaks of red, raised blisters. Poison ivy cleansing products (e.g., Tecnu skin cleanser) can help remove urushiol from skin if used within four to eight hours of exposure.
Poison ivy is a plant that causes a persistent, itchy rash because the plant contains urushiol oil, which causes a reaction in most people.
Some plants can cause itchy rashes when touched.
The rash doesn't usually spread unless urushiol is still in contact with your skin. Magnesium sulfate containing skin products (e.g., Dr. Rinsing your skin with lukewarm, soapy water or rubbing alcohol within about an hour of touching poison ivy can remove the urushiol and help you avoid a rash — or at least make it less severe.