A.S.
We discovered our daughter was allergic to cashews (she had had peanut butter before with no reactions) when she was around 3 years old. It happened totally by accident as hubby thought I was giving her cashews but didn't see the bowl of raisins on the counter. In her case, she broke out in a rash on her face as well as mild swelling in her cheeks. We immediately took her to the ER. She was fine but the rash took a few days to disappear. Later she had some allergy testing done and they said she was only allergic to cashews but told us to hold off on any tree nuts until she was closer to 5. As I found out these nut allergies along with being very serious are also very tricky and anything is possible (developing later, etc). I would say call your Doc and see what they think and if allergy testing should be set up.