Patients with gastrointestinal problems are best not to eat them. Cool fruits are harmful to the body. Fruits such as pears, citrus, and grapefruit should not be eaten. Eating too much will cause gastrointestinal disorders, toothache, hemorrhoids, and even yellow spots on the skin. Pay attention to the following 11 guidelines: 1. Eat less fried food: Because this type of food is not easy to digest, it will increase the burden on the digestive tract. Eating more will cause indigestion and increase blood lipids, which is not good for the body. 2. Eat less pickled food. Prepared foods: These foods are rich in salt and some carcinogens, so it is not advisable to eat too much. 3. Eat less cold foods: Raw, cold and highly irritating foods have a strong impact on the gastrointestinal mucosa and can easily lead to diarrhea or gastrointestinal inflammation. 4. Eat regularly: Eating meals regularly, on time, and in quantity will help the excretion of the digestive glands and be more conducive to digestion. 5. Be punctual and quantitative: Eat a moderate amount of food at each meal, and be punctual for 3 meals a day. When the prescribed time is reached, regardless of whether you are hungry or not, you should take the initiative to eat to avoid being overly hungry or overfull. 6. Suitable temperature: The temperature of food should be "not hot, not cold". 7. Chew slowly to reduce the burden on the gastrointestinal tract. The more you chew your food, the more saliva you secrete, which has a protective effect on the gastric mucosa. 8. Timing of drinking water: The best time to drink water is in the morning on an empty stomach and 1 hour before each meal. Drinking water immediately after a meal will dilute gastric juice, and making rice with soup will also affect the digestion of food. 9. Pay attention to preventing cold: If the stomach gets cold, the function of the stomach will be damaged, so pay attention to keeping the stomach warm and not to catch cold. 10. Prevent adverse effects: Do not smoke. Smoking shortens the blood vessels in the stomach, affects the blood supply of gastric parietal cells, reduces the resistance of the gastric mucosa and induces gastric diseases. You should drink less alcohol and eat less spicy food such as chilies and peppers. 11. Supplement vitamin C: Vitamin C has a protective effect on the stomach. Maintaining normal vitamin C content in gastric juice can effectively promote the function of the stomach, protect the stomach and enhance the disease resistance of the stomach. Therefore, eat more vegetables and fruits rich in vitamin C. MORE: What should people with a weak stomach eat?