Any food should be consumed in moderation and not in excess. Eating too much fruit may lead to tooth damage, stomach upset, mouth ulcers, and other symptoms. Although fruits are rich in nutritional value, eating too much of them will inevitably damage your health. Fruit in the fruit acid and fructose, can damage tooth enamel, and into the stomach and gastric acid mixed, can stimulate the gastrointestinal tract to produce digestive tract, if there is gastritis, gastric ulcers, gastroesophageal reflux and other patients, need to eat less acidity of fruit, such as hawthorn, lemon and so on. Fructose raises blood sugar and is not conducive to blood sugar control in diabetic patients. Some fruits contain proteases that can cause mouth ulcers, such as pineapple. Therefore, in daily life, you should control the intake of fruits and choose the right fruits to eat according to your own situation.