Not sure what caused your poison ivy/oak rash? Many people know what poison ivy or oak rash looks and feels like, but do not really understand why the plants cause such a painful, itchy rash. Once you understand how poison plants work, it is easier to avoid a rash
Poison ivy, oak and sumac all produce the same rash-causing, resinous oil called urushiol (pronounced ooh-roo-she-all). It is found in all parts of the plants including the leaves, stems, and roots. It can stay potent for many years, even on dead plants. For some people, it can take a very small amount to cause a very big reaction.
What causes poison ivy rash?
85% of the population is allergic to the urushiol found in poison ivy, oak, and sumac plants. It is your body's immune response to this allergen that causes the painful rash. Depending on your sensitivity to urushiol, your body's reaction can vary from mild to severe. Poison ivy, oak and sumac rash symptoms can include:
- Itchy skin where you came in contact with the oil
- Redness or red streaks
- Hives or small bumps in the skin
- Fluid-filled blisters that may leak. Note that the fluid in the blisters does not cause the rash to spread, contrary to common myths about poison ivy and oak.
Symptoms of poison ivy, oak or sumac rash usually start within a day of coming in contact with urushiol but can take as long as two weeks to show up. Using an OTC treatment for poison ivy can help alleviate the symptoms for most people. For more severe reactions, it is best to consult a doctor.
In addition to coming in direct contact with the plant, you can also get a rash through secondary contamination. Urushiol can stay on objects such as tools, clothing, gloves, and shoes for several years. Your pets can also transfer the oil to you if they run through the plants and get it on their fur. The best way to prevent secondary contamination is to remove the oil from any possible secondary sources.
Learn how to use Tecnu® Original Outdoor Skin Cleanser to remove urushiol.