Exposure to the irritation chemical in this plant can cause blistering, redness, weeping, crusting, and itching. The rash may appear in a few hours, days, or weeks, depending on the extent of the exposure and the degree of sensitivity.
Most exposures occur by direct contact with the plant.
Other sources of exposure are people's or pet's bodies, clothing, and smoke and vapors. The bare stems are as irritating as the leaves. Wash entire body, all clothes, pets, etc. The irritant can be removed with mild soap and water, but it must be done within 10 minutes of exposure to prevent a rash. Washing anytime after exposure will reduce the severity and help prevent spread to others.