Why Pineapple Can Make Your Mouth Tingle
This is probably the most interesting part of the story.
When you eat fresh pineapple, you're consuming a fruit containing both citric acid and bromelain.
The acidity contributes to the fruit's sharp, tangy flavor.
Bromelain interacts with proteins.
Your mouth contains proteins, including proteins in saliva and the surface tissues of your mouth. The exact experience varies from person to person, but the combination of acidity, enzymes, and repeated exposure can leave some people with a tingling or slightly sore feeling.
This tends to become more noticeable when someone eats a large amount of fresh pineapple at once.
That's why a few pieces may taste wonderful, while half an entire pineapple can leave your tongue feeling strangely uncomfortable.
