Is This a Pineapple Allergy? Doctor Explains Sources- PMID 38542694 Many people experience a strange tingling or “stinging” sensation on their tongue and the roof of their mouth after eating fresh pineapple, but this is usually a physical side effect of an enzyme rather than a true allergic reaction. This phenomenon is caused by bromelain, a potent mixture of proteolytic (protein-digesting) enzymes found in the fruit and stem of the pineapple. When you eat the fruit, the bromelain begins to brea