zogger
Tree Freak
Reaction
Some people can experience a (sometimes quite severe) histamine reaction, which lead to that observation of it "spreading" past the oil contamination zone.
If your hands are free of the sticky, resin-like oil (urushiol), rubbing or scratching the rash will not spread poison ivy, oak or sumac to other parts of your body (or to another person). Some people get blisters, and breaking them will not spread it either (someone is gonna' argue with me, but it is a myth). The oil (urushiol) is absorbed by the skin within minutes, but the excess is easily washed off with lots of cold water (hot water may open skin pores making the rash worse) and most cleansers. The problem with urushiol is it doesn't degrade and can last with full potency on surfaces for years... surfaces like tool handles, steering wheels, watch bands and belt buckles. And now for the big kicker, when urushiol gets on your cloths, and you toss the clothes in the washer it can spread to to other cloths items. Clothes suspected of being in contact with urushiol should be washed separately, at least twice, in a strong mix of detergent and water. Understand that the amount of urushiol it would take to cover the head of a pin could give 500 people a rash from head to foot.
I get poison ivy rash several times a year, often after running the weed-eater around the edges of the grove; I normally don't get the big blisters, just a rash and a few smaller blisters. After using the weed-eater I've learned to strip outside and carry my clothes straight to the washer and wash them separately while I take a long, cool, soapy shower. I pat dry, rather than rub dry, with the towel and wash it immediately. This seems to minimize the amount and severity of the rash, which I do not treat with any medicines, creams or chemicals... takes about 2-3 weeks to go away. The "itch" isn't all that bad for me, kind'a comes and goes. The effects are different for every person; all my dad has to do is walk down wind from the stuff and he breaks out in a horrible nasty rash with blisters, while my three-year-old appears to be immune to the stuff... I've caught him rolling in it. Dad borrows my weed-eater a couple times a year because his gets left up at the lake home from time-to-time; I need to wash it with tire cleaner and plenty of water before he takes it or just the act of touching it will cause him to break out in a bad, painful rash.
Some people can experience a (sometimes quite severe) histamine reaction, which lead to that observation of it "spreading" past the oil contamination zone.