This vine has miniscule thorns that cause swelling after entering the skin I.e. arm, leg. These thorns infect the area for as long it is in the skin until you remove with needle and tweezers.
Do you know the name of this plant?
As an aside, my dog was limping for about a short time last year thinking it was arthritis. Make me wonder if she stepped on a thorn. Anyway she is OK now and runs, jumps with no problems.
