Spreading poison ivy?
Poison ivy can itch like crazy, and make you want to scratch just as
much. You should resist the urge to scratch those poison ivy blisters,
but not because the fluid will spread the poison ivy. The risk from
scratching is the possibility of infection, says the American Academy
of Dermatology.
The rash from poison ivy is caused by urushiol (you-ROO-shee-ol), the
oil found in the sap of poison ivy (and its cousins, poison oak and
poison sumac). The oil is very persistent -- you can get it on your
skin from touching the plants, or from the fur of pets that have touched
the plants, even from clothes or tools. The oil penetrates your skin
and the rash usually appears within 12 to 48 hours. The rash may take
longer to appear in areas where the skin is thicker and tougher, which
may make it appear that the infection is spreading.
If you know you've been in contact with poison ivy, wash any exposed
areas of skin in cold water as soon as possible. Washing with soap and
water up to 30 minutes after exposure will help. Wash your clothes too,
and avoid getting the oil on rugs or furniture in your house -- urushiol
can stay active for months.
July 27, 2002
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