In my effort to get a gazillon of free cuttings from Catherine's Nacido and that Wild One, My arms were really itchy, but they didn't develop blisters like that. However, I wear elbow length gloves when going deep into fig trees now.
Calamine Lotion could help, or Baking Soda made into a paste.
Reminds me, my little friend, Carollee and I were picking Blackberries over at granpa's house, and Carollee got poison oak. Just a little on her arm. Gramp taught me to avoid, but she got it, and got a lot of attention from her family, so jealous little sister went over to grandpa's and RUBBED the stuff on herself. She was truly sorry, and looked like a ghost for days with that Calamine Lotion.
If you know you are allergic, you should take precautions, like big long gloves!!
Suzi