If you are the kind of person who has a reaction to Poison Ivy/Oak/Sumac-whatever... Basically, if you get a rash (contact dermatitis) from any of those, in case you didn't already know- It's caused by "urushiol" found on the leaves. Once you've touched it, you have about an hour or less to wash it off THOROUGHLY, or get ready for the tin weeping blisters to come along...
Anyhow, if you like Mangos... Be careful. I found out this weekend that Mangos caontain Urushiol in the skin, stem, and leaves of the plant. I ate a mango (skin on) last Thursday, and I looked like Jospeh Merrick byt Sunday. A shot in the keester of steroids didn't help, so now I'm on a 12-day prednisone reginmen...
Also while I'm in here, I might as well clear up some other things about Urushiol (poison):
500 people could itch from the amount covering the head of a pin.
1 to 5 years is normal for urushiol oil to stay active on any surface including dead plants.
Burning poison ivy leaves is a BAD idea, as urushiol becomes airborne, and WILL get on you.
Rubbing the rashes won't spread poison ivy to other parts of your body (or to another person). You spread the rash only if urushiol oil -- the sticky, resinlike substance that causes the rash -- has been left on your hands. Popping the blisters will NOT cause anything to spread.