From the perspective of traditional Chinese medicine, grapes are flat, sweet and sour, non-toxic, that is to say, grapes are flat, without hot air or cold, suitable for anyone to eat, and can be eaten in large quantities without getting angry.

However, grapes contain a lot of sugar and plant acids, which will absorb a lot of water in the mouth and cause serious irritation and damage to the oral mucosa. If you are contaminated by fungi in your mouth, you may have an oral ulcer, but it has nothing to do with getting angry. Don't eat a lot of grapes. You'd better rinse your mouth as soon as possible after eating.