Hi. Every Time I Eat Sour Food I.e Sour Apples,

Hi. Every time I eat sour food i.e sour apples, lemon juice (added to the food) etc my tongue gets abraded and sore and a big circle shows up at the right side of my tongue that it looks like my flesh got peeled off. It goes away after a day but every time this happens and not with the food as sour as sour candy. Even slightly sour edible stuff can cause this.
I don't smoke and I'm not an alcoholic.
Your assistance would be much appreciated.