Not sure if this is similar or related, but for me, when mine got inflamed and painful it was because of GERD.
So I had to really tighten the reins on what types of foods I was eating. I didn't necessarily have stomach pains or problems, and I didn't consciously feel like any active bouts of GERD were taking place, but this was the precursor.
The acid can kick up into our throats and irritate the backs of our tongues.
Staying away from trigger foods like coffee, tea, soda, fried foods, oily/greasy foods, dairy, certain deli meats, onions/garlic, hot peppers, tabasco sauce, certain nuts and seeds,...
I don't have any problems with things like lemons or limes or oranges....it isn't (for me, anyway) the acid, necessarily, but rather what the offending food product does once it has entered my stomach. That is the culprit.