Do poison ivy blisters cause the rash to spread?


No, not if the oil has been removed from the skin.  The blisters are the body's natural allergic reaction to the initial contact with the urushiol oil.  The only thing that causes the rash is contact with urushiol oil.  The oozing from the blisters does not spread the rash.

Use Tecnu to remove poison ivy and oak oil from skin, pets, tools and equipment

What Tecnu Do I Use?

Not sure what Tecnu to use? Check out our infographic.