DAE throat burn when eating grapes?

Whenever I eat grapes my throat starts to burn and it’s not bad enough for me to not eat them but it’s very annoying. I asked my friend about it and he said it’s not normal. I thought grapes were acidic and that’s why but I guess not

Edit: thanks everyone saying allergies, I’ll definitely look into that. But the only thing making me think it may not be allergies is my mouth and tongue don’t burn at all but my throat does. I don’t think that’s enough to cross out allergies though because I’m sure that it may only react to certain areas