Pineapple contains alkaloids, called pineapple prion enzyme, is a proteolytic enzyme, occurring in the hydrolysis of muscle tissue biochemical reaction, it can dissolve muscle tissue in the fibrous protein, the tongue is stimulated by a tingling sensation, so eat pineapple before the general use of light saline soak pineapple for more than 30 minutes, to maximize the reduction of pineapple prion enzyme concentration to minimize the stimulation of the muscle stimulation is reduced, reduced tingling sensation will not be sensitive. The irritation to the muscles is reduced, and the tingling sensation is less sensitive when it is alleviated. What should I do if I eat a pineapple that has not been soaked in salt water and my tongue hurts? You should gargle with salt water, and gargle several times to dilute the pineapple prion enzyme, and the effect of dissolving muscle tissues will gradually disappear, so the tingling sensation will gradually be relieved.