Itch Alert: Poison ivy seems to be growing faster and with greater potency

With spring in full swing, you're likely spending more time outdoors these days. Here's a tidbit of information you're probably not itching to read: According to researchers at Duke University, a rise in levels of carbon dioxide can boost the growth rate and potency of poison ivy, which appears throughout the U.S. as a vine or as a low shrub and has three-leaflet leaves.

Urushiol (yew-ROO-shee-ol) is what causes the irritating itching, redness, swelling, and eventual blisters. This nefarious oil can stick to nearly anything, meaning that you can get the nasty rash not only by brushing up against a poison ivy plant but also by touching something that has the oil on it, such as a pet's fur, a garden tool, sports equipment, or a toy. Particles of urushiol can also get released into the air and land on your skin when the plant is burned; airborne particles can also cause internal inflammation. Typically it will take 12 to 72 hours after the oil has touched the skin for the itchy redness and swelling to appear. (The rash cannot spread and is not contagious.)

To keep from coming in contact with the plant, say when you are working in the yard or are out for a hike, wear long sleeves, long pants, and socks. Applying the over-the-counter topical IvyBlock to your skin before you come in contact with poison ivy can lower your risk.

If you have brushed against a plant or an object with urushiol on it, wash your skin with soap and lukewarm water and launder you clothes. Also clean off the item that has urushiol on it.

If you develop a mild rash, the American Academy of Dermatology recommends you take cool showers and use an over-the-counter itch-relief product. Oatmeal baths and mixtures made with baking soda might also help. For a severe reaction, see a dermatologist or go to the emergency room. The doctor might prescribe a medication to reduce the swelling and itch.—Kimberly Janeway | e-mail | Twitter

Photo courtesy of www.poison-ivy.org