I had allergies as a child - the sneezing kind, but I seemed to outgrow them. But in recent years I’ve had a few odd food allergies. Not intolerance but a kind of delayed reaction, starting about 4 hours after eating, resulting in swollen mouth and lips and lasting at least 24 hours. One time it was to cod’s roe, but now I’m definitely allergic to buffalo milk and products like buffalo mozzarella!
I wasn’t always allergic to buffalo milk as I’ve been to India, where many dairy products are from buffalo, lots of times but only started reacting in recent years.
At least I now know what I’m allergic to, and can mostly avoid, but hay fever type allergies are harder to deal with.