People with stomach disease are not suitable to eat fruits with higher acidity, fruits with higher sugar content, dietary fiber-rich foods, etc. 1. Fruits with higher acidity: If you consume fruits with higher acidity, such as: hawthorn, pineapple, lemon, etc., it may stimulate the excessive secretion of gastric acid, which will aggravate the damage of gastric mucous membrane and make your condition more serious. 2. Foods with high sugar content: Foods with high sugar content, such as mango, lychee, cantaloupe, etc., may accelerate the secretion of gastric acid and aggravate the condition if consumed by patients suffering from gastric diseases. 3. Dietary fiber-rich foods: If you eat dietary fiber-rich fruits, such as cherries, apples, dragon fruit, etc., is not conducive to human digestion, and the fiber content contained in the food will accelerate the secretion of gastric acid in the organism, resulting in gastrointestinal discomfort, leading to aggravation of the condition. Therefore, patients suffering from gastric diseases should eat reasonably under the guidance of professional physicians to avoid aggravation of the condition.