Poison Ivy, Oak & Sumac: A rash of information about identification, treatment and prevention.
What is it?
Poison ivy, oak and sumac belong to a family of plants that produce one of the most common allergic reactions in the United States. Experts estimate that up to 85% of the population is allergic to urshiol (you-roo-shee-ol), the oil found in the sap of these plants. The reaction, known as “urushiol-induced allergic contact dermatitis,” occurs when urushiol attaches itself to the skin after a person’s direct or indirect exposure to the oil. Symptoms like rashes, oozing blisters, itching and swelling are the body’s way of telling you that you are having an allergic reaction.
What does it look like?
Poison Ivy: the most common of the three plants, is characterized by three pointed leaflets. These leaves assume bright colors in the fall turning yellow then red.
Poison Oak: has three oak-like leaves and grows as a low shrub in the eastern U.S. and as both low and high shrubs in the western U.S. where it is most prevalent. Poison oak produces whitish flowers from August to November that dry but may remain on the plant for many months.
Poison Sumac: has seven to thirteen leaflets per leaf. The leaflets have smooth edges and pointed tips. Mainly found in the eastern U.S., poison sumac grows in peat bogs and swamps as a shrub or a small tree. The allergen containing berries are white and grow between the leaf and the branch.
Questions & Answers:
Q: How do these plants cause allergic reactions?
A: Urushiol, the allergen found in these plants, attaches to the skin within five minutes to two hours after exposure. This event triggers an allergic response, whereby the body’s immune system attacks the skin containing the urushiol. Reactions result from direct contact with broken leaves or stems of the plant, indirect contact by touching something that has urushiol on it (like a family pet or garden tool) or through airborne exposure to burning plants.
Q: What are the signs and symptoms?
A: An allergic reaction to poison ivy, oak and sumac is quite intense and far more common than any other cause of an allergic skin reaction. Signs and symptoms include redness, swelling, warmth, blistering, tenderness and of course, itching.
Q: What are the treatment options?
A: Over the counter remedies like calamine lotion or hydrocortisone may alleviate the itch. Your healthcare provider also may prescribe steroids for more severe cases to reduce inflammation and stop itching. However, side effects of excessive use may include thinning of the skin, acne and discoloration. Oral steroids also carry health risks, especially for young children.
Zanfel Poison Ivy Wash provides a valuable alternative to drug therapies for mild to moderate cases. Sold in the First Aid section of pharmacies. Zanfel is clinically shown to remove urushiol after outbreak and relieve itching within seconds of use.
Medical experts caution against the use of topical creams containing anesthetics (bezocaine) or antihistamines (diphenhydramine), because these agents are known sensitizers that can actually worsen the rash through the body’s allergic response to these drugs. Further, there is doubt of their effectiveness.
What to do if you’ve been exposed to poison ivy, oak or sumac:
- Cleanse: Immediately cleanse the area with plain soap and water, paying special attention to the palms of your hands. Since this outer layer of skin is thicker, urushiol does not penetrate the area and can be carried on the palms for hours. Urushiol will bind to the skin within five minutes to two hours after exposure. After binding, plain soap and water are no longer effective at removing urushiol.
- Decontamination: Remove and wash all clothing, shoes and shoelaces that may come in contact with the oil.
- Relieve: If signs or symptoms appear, use Zanfel, the only product clinically shown to remove urushiol from the skin after breakout and relieve itching. Removing urushiol is the most important step in eliminating the reaction. Other common remedies, such as calamine lotion, may produce mild and temporary relief of the itch but will not remove the oil.
- Don’t scratch! Scratching may cause infection because it allows bacteria from dirt on the hands to enter the skin. Excessive scratching may also cause scarring.
- See your healthcare provider: Be sure to consult your healthcare provider if symptoms worsen and/or the rash spreads to the mouth, eyes or genitals. Severe reactions may require further treatment.
Itching for more information?
Myth: Poison Ivy is contagious.
Fact: Since poison ivy rash is an allergic reaction to urushiol (the toxin found in poison ivy, oak and sumac plants), the only ways to contact poison ivy are through direct contact with the plant; indirect contact by touching something that has urushiol on it (like a family pet or garden tool): or through airborne exposure to burning plants.
Myth: Scratching poison ivy blisters will spread the rash.
Fact: The fluid in the blisters will not spread the rash. After the first five minutes to two hours following exposure, neither scratching no skin to skin contact can spread the reaction. However, excessive scratching may cause infection because it allows bacteria from dirt on the hands to enter the skin.
Myth: Dead poison ivy plants are no longer toxic.
Fact: Urushiol stays active on any surface, including dead plants, for up to five years in wet climates and up to nine years in dry climates.
Myth: Once allergic, always allergic to poison ivy.
Fact: A person’s sensitivity changes over time, even from season to season. Sensitivity to poison ivy tends to decline with age as the body’s immune system slows down.
How to prevent a scratchy situation:
- Know what to look for and educate your family.
Prevention is the best form of protection from poison ivy, oak and sumac reactions. Before you head outside, make sure your family knows how to identify these plants so they can avoid them.
2. Wear protective clothing:
Clothing including long pants, long-sleeved shirts, hats and gloved, can help protect you from exposure.
3. Wash outdoor items frequently:
Be sure to wash all clothing, shoes, tools or pets that may have been exposed.
4. Do not burn any suspicious plants.
Burning the problematic plant and inhaling its smoke can cause a systemic reaction which can be deadly. Also, do not burn items of clothing or rags that may have been exposed.
5. Stop the symptoms before they start.
If you know you’ve been exposed to poison ivy, cleanse the area immediately with plain soap and water to remove urushiol before it has a chance to bind to the skin.
For more information about poison ivy, oak and sumac, visit http://www.zanfel.com or call 1-800-401-4002. Zanfel is a product of Zanfel Laboratories. Inc.
Disclaimer: this information was taken directly from a Zanfel Laboratories Inc. pamphlet and I give them full credit for their work. Please call or email the above numbers for more information on the product.
