You're gonna need some real cold water. Either ice water or refrigerated, or really any drink that's super cold and chilled. Drink that first, slosh all that cold liquid in your mouth, and then take a piece of whatever you're eating and put it in your mouth while it's still cold inside. Preferably a small piece, just to be safe; this is still kinda risky to do.
Let me know how this works out for you if you give it a try.
Alternatively do this but with pickled vegetables still cold from the fridge instead of the water
Could be regular pickles, could be kimchi, whatever goes with what you're eating