Poison Ivy And Its Relatives
In the Northern Hemisphere, warm weather is upon us and school is done for the summer. As such, we can expect a lot more time in the outdoors for the average family. Although this is ordinarily a healthy pursuit, there are circumstances where you will find that some things out there that present hazards that are difficult to avoid.
Unless you live in Alaska or Hawaii, a mountaintop, or the middle of the desert, the outdoors will have a population of poison ivy, poison oak, and/or poison sumac. Once exposed to one or the other, 85% of the population will develop antibodies against it that will generate an itchy rash of varying degrees of severity. Winter does not eliminate the possibility of a reaction, as you can react against even the dormant vines or shrubs.
All of these plants contain toxic oil that causes a reaction after the first sensitizing exposure. The oil is in just about every part of the plant: The vines, leaves, and roots. Most people don’t know they have been exposed, even if they know how to identify the plant. Just think how difficult it is to be aware of every single plant you might come into contact with when you hike in the woods. Also, many people are exposed indirectly; for example, by petting the fur of a pet that has been exposed.
The best prevention is to avoid getting the toxin on your skin. If you can’t avoid exposure, here is advice before you head out into the woods:
- Long pants, long-sleeved shirts, work gloves, and boots are imperative if you’re doing work in areas known to have poison plants.
- Some recommend an over-the-counter lotion called Ivy Block as a preventative. Apply it like you would a sunblock to likely areas of exposure. Theoretically, it will prevent the oil from being absorbed by your skin.
Unfortunately, many times people don’t identify the exposure before it’s too late. The rash takes from several hours to several days to become apparent. Usually, you will notice:
- Itchiness where your skin was exposed to the plant.
- Red streaky rashes where the plant brushed against you.
- Small bumps or hives along with the redness.
- Occasional blistering.
Cleansers that remove resin or oil such as Fels-Naptha soap or Tecnu Poison Oak and Ivy Cleanser are more effective than regular detergent and can be used even several hours after exposure. Rubbing alcohol is another reasonable option and easily carried as hand sanitizers or prep pads; it is, however, very drying to the skin.
The good news is that, even if you choose not to treat the rash, it will go away by itself over 2-3 weeks. The bad news is that it could be so itchy as to make you absolutely miserable. Diphenhydramine (Benadryl) at 25-50 mg dosages 4 times a day will be helpful in relieving the itching. It’s important to know that the 50mg dosage will make you drowsy. This may be an added benefit at night to help you sleep, but not if you are in any situation that requires alertness. Unfortunately, calamine lotion and hydrocortisone cream, old standbys, will probably not be very effective.
Severe rashes have been treated with the prescription Medrol dose pack, (a type of steroid known as Prednisone). Prednisone is a strong anti-inflammatory drug and will be more effective in preventing the inflammatory reaction that your antibodies will cause. This medicine would be a useful addition to any medical supply list if obtainable.
Some astringent solutions such as Domeboro have been reported to give relief from the itching. The active ingredient is aluminum acetate, which is similar to the aluminum chlorohydrate in many antiperspirants.
There are several alternative treatments for poison ivy, oak and sumac:
- Cleansing the irritated area with apple cider vinegar
- Essential oils mixed with Aloe Vera gel, such as tea tree, lemon, lavender, peppermint, geranium, and chamomile.
- Baking soda paste
- Epsom salt baths.
- Jewel weed (mash and apply)
- Chamomile tea bag compresses
For those who prefer drinking their tea: Passion flower, skullcap, and chamomile are all thought to be soothing.