I quite like nuts and often have a handful for an afternoon snack. The past 10 days or so I've had a slightly swollen tongue most evenings, not dangerous or anything, just a bit noticeable. This evening my tongue is normal and it has occurred to me that I haven't had any nuts today.
What makes me think that it's probably not an allergy is that I've been eating nuts my whole life and never had a problem, except sometime having a slight tickly cough after hazelnuts, but that's probably to do with their texture. What makes me think it could be an allergy is that I have tree-pollen hay fever at the moment and at this time of year I often become sensitive to things that are ok the rest of the year, like skin care or laundry powder for white clothes.