The Three Poisonous Plants
Poison ivy, oak, and sumac are the three plants known to induce rashes upon contact. These plants produce urushiol, which is the oil leading to this skin reaction. The reaction is described as an acute and itchy eruption, often in a linear pattern where the plant leaves have brushed against the skin.
At times, blisters may form as well. Symptoms may be mild to severe. Poison ivy occurs throughout the US and is particularly common in New York and New Jersey. Poison sumac is common in wooded, swampy areas. Poison oak is most common on the west coast. Exposure can occur year round; however, is most common in the spring and summer.
Typically, the palms and soles are spared as the oil of these plants cannot penetrate this thick skin. Short term use of topical or oral corticosteroids is the main therapy for the rash. If you think you have this rash, it is important to be evaluated by your dermatologist today, as secondary infection may also occur.