Jewel weed is found in swamps lakes and wet places. This how-to video demonstrates using the jewel weed stems on the infected area until the bumps or blisters break open. Jewel weed has a chemical that neutralizes poison ivy, oak, or sumac oil, so it's okay to scratch with Jewel Weed. Jewel weed also works well on mosquito bites, burns, and skin diseases. Find out how to treat posion ivy, oak, or sumac with jewel weed by watching this video outdoor safety video.