Have I ever mentioned my cashew allergy? Very hard to diagnose and extremely unpleasant. I have no allergic symptoms while eating them. But about three days later, well, let's just say they caused severe itching on the way out. Constant anal itching that lasted for about a week.

The first time it happened, I was mystified. The second time, I remembered that I had had cashews a few days earlier and had also had them a few days before the first event (it was right at the end of my vacation, which made it easier to remember what I had been doing/eating since it was different from my everyday habits). I waited a couple of weeks for the symptoms to completely go away and then tested it by eating more cashews, and bingo.

Some internet research revealed that this particular allergy is related to allergy to poison ivy. Apparently mangos can cause a similar problem. It's worth noting that I had to dig a bit to find this information.

BTW I love cashews and had never had any problems with them before last year. So if you have reason to suspect an allergy to latex, it's best to avoid all related triggers even if you've never had a problem with them before. But I would also consider more immediate possible causes, such as anything you had been eating recently or anything you might have been breathing in such as cleaning solvents or other chemicals being used in the vicinity.

In your case, OakLeaf, I would call the restaurant manager and tell them what happened, and ask if you can have a complete list of the ingredients in the dish.