Poison Ivy, Oak, and Sumac

Poison ivy, poison oak, and poison sumac are plants that have a sticky oil that can cause an itchy, red rash. The rash often shows up in lines or streaks along with blisters or large raised areas (hives). In some people, it causes serious symptoms such as swelling and widespread, large, oozing blisters.

Home treatment will often relieve mild symptoms. Prescription medicine may be needed for severe reactions.

The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.