There is no harm in eating pineapple in moderation at night in general, but eating it for a long time and in large quantities may lead to excessive sugar intake, indigestion, and even affect the quality of sleep. Pineapple is a common fruit, 100g of pineapple is rich in 88.4g of water, 0.5g of protein, 10.8g of carbohydrates, 20mg of carotene, 18mg of vitamin C, 113mg of potassium, 0.2mg of niacin and so on. Usually people eat pineapple at night in moderation is not harmful, but also to a certain extent to replenish the body’s required nutrients. Because pineapple is acidic food, and contains a certain amount of sugar. Therefore, if people eat pineapple for a long time and a large amount at night, it may lead to excessive sugar intake, stimulate the gastrointestinal mucosa, and induce indigestion, affect the quality of sleep at night, etc., which should be taken seriously. If the crowd is allergic to pineapple, it is forbidden to eat, in order to prevent accidents. It is recommended that people eat a moderate amount of fresh pineapple and other fresh fruits and vegetables. In order to improve the quality of sleep, people should avoid eating before going to bed.