What happens if I touch common ivy with bare hands? The short answer is most people feel nothing but sensitive skin can break out. Your reaction depends on your own skin type and how much sap leaks from the cut stem. A quick brush is fine but a long prune can hurt.
I learned this myself after a long prune of a thick wall vine last spring. My wrists looked fine when I finished the job that morning. The first signs of an English ivy rash showed up about 24 hours later in red itchy bands.
I had grown ivy and other houseplants for years with no reaction at all. The size of the prune made the difference for me this time. A few cut stems leaked a lot more sap onto my bare skin than I had thought.
The science behind the reaction is well known among plant doctors today. The sap holds a compound called falcarinol. These drive what doctors call Type IV allergic contact dermatitis in some people.
About 1 in 5 people show some level of skin reaction to ivy sap. The other four feel nothing even after a long day of yard work in the vines. You may not know which group you fall in until you test your skin once.
The Washington State NWCB lists English ivy as a skin irritant on its data sheet. NC State Extension goes further and names the full list of symptoms. The list covers redness, itching, swelling and small blisters along the contact zone.
Hedera helix sap dermatitis can show up right away or take a full day to appear. The delay throws many people off the trail of the real cause. By the time the rash blooms, you may have forgotten the prune from yesterday.
The rash tends to last three to seven days for most healthy adults. Mild cases fade on their own with no need for any cream or pill. Bad cases with blisters may need a doctor visit for a stronger steroid cream.
Wash the exposed skin with soap and cool water within 30 minutes of contact. Skip hot water since it opens pores and pulls more sap into the skin. Scrub gently with a soft cloth to lift the sap from the surface oils.
Apply a thin layer of 1% hydrocortisone cream to any itchy patch. Take an oral antihistamine before bed if the itch keeps you awake at night. Use a cold pack on swollen spots for 10 minutes at a time across the day.
Wear long gloves and long sleeves for any ivy contact dermatitis trigger work. Pick gloves rated for chemical use since the sap soaks through thin garden pairs. A pair of $10 nitrile gloves saves you a week of itchy wrists later on.
Cover any cuts or scrapes on your arms before you start the job too. Open skin lets the sap reach deeper tissue and the rash hits much harder. Toss your work clothes in a hot wash right after the prune to clean off any sap.
Call a doctor right away if the rash spreads past the contact zone. Also call if you spot any breathing trouble or swelling around the eyes. Those signs point to a stronger allergy that needs real medical care, not a home cream.
Read the full article: English Ivy: Care, Cultivars and Caution
