Tongue will hurt after eating pineapple you can use light salt water or milk to relieve the discomfort of the tongue. It contains a component called pineapple prion enzyme, which is able to dissolve fibrous proteins in muscle tissues. Therefore, the reaction of tongue feeling pain or numbness and acidity after eating pineapple is actually a biochemical reaction of hydrolyzing muscles, that is, pineapple prion enzyme in pineapple decomposes the proteins in tongue, mouth and lips. When eating pineapple, the tongue discomfort, you can immediately mouth with light salt water or repeatedly gargle with salt water, through the inhibition of pineapple prion enzyme activity to reduce the discomfort; or you can also mouth milk, because a large number of proteins in the milk and pineapple prion enzyme after the role of pineapple prion enzyme and the role of pineapple prion enzyme and the tongue on the proteins will be reduced, and the damage to the tongue will also be reduced. Usually, in order to avoid the pain caused by eating pineapple, the pineapple will be soaked in salt water for a period of time first to inhibit the activity of pineapple prion enzyme. However, if the soaking is insufficient or not done, the pain will still occur, which can be relieved by the methods mentioned above. If the pain persists and worsens, accompanied by discomfort such as redness, swelling and itching of the mouth and the whole body, allergy should be considered, and it is recommended to go to the hospital for consultation.