I used to play paintball in the woods a lot when I was younger. There were times were my face and arms were swolled the fuck up due to poison ivy. so I did my research and know how the shit looks like, so i stay clear away from it. Anyways, Im at my mothers house and shes got a cashew tree in her backyard, that never gave fruit. until now. I love cashews so she let me pick them and prep them. You have to roast the SEED to get all the "toxic" oils out. Well I ate quite a bit and later on that night, I looked in the mirror and thought I say jay z. my lips were HUGE. turns out this fucking cashew oil contains the same ingredient poison ivy,sumac and oak have that gives such a reaction to the skin. The oil got all over my face (wiping sweat of forehead) all over my forearms and somehow behind my knee. luckily we have a doctor in the family and had to take 2 steroid shots in teh butt. shit worked wonders because I was MUCH better the next day.
notes - if your allergic to poison ivy, DO NOT fucking with cashews straight from the tree.