In severe cases, oozing sores develop. The rash spreads by the poisonous sap, not as the result of contamination from sores. Although extremely irritating, most cases disappear in a week or 10 days. In the meantime, relief may be found through the application of medication available in most drugstores. However, severe rashes, especially those covering large areas or accompanied by above-normal body temperatures, should be examined by a physician.
Medical treatment is most effective if applied before the oozing sores appear.
Wash infected skin as soon as possible with cold water to minimize the severity of the rash and prevent the spread of the sap to uninfected parts of the body. Unfortunately, your skin absorbs the active compounds in the sap within the first 3 minutes, and you cannot prevent the dermatitis without medical treatment. Soap and water are superior to water alone in removing the sap, but they also temporarily remove a natural protective layer that helps keep the active compounds from being absorbed through the skin. You can decontaminate clothing by laundering with soap or detergent.