I ran into this vine while weeding around my house.  The worst effects on my body are my legs.  I have included 1 picture of the vine and 2 pictures of it's affect on my legs after 1 week of treatment with an oral prednisone prescription.  It was greatly improved when these pictures where taken.  I zipped the pictures.  Please let me know if you are unable to open them.

Is it poison? It has more than 3 leaves.

Thanks,

Cindy