After a partial gastrectomy, especially after a Billroth II procedure, inflammation at the residual stomach and anastomosis is more likely to occur. This may be caused by factors such as bile reflux and the lack of trophic effects of gastrin-secreting cells.

　　Due to the removal of most of the stomach, the function of the pylorus, which acts as a gatekeeper, has been lost, allowing the alkaline fluid of the small intestine to reflux into the stomach freely. Because bile has a strong

　　Under the gastroscopy, the inflammatory manifestations such as congestion, edema, roughness, fragility, hemorrhage, and erosion of the residual gastric mucosa can be seen at a glance. Moreover, the inflammation at the anastomosis is often more severe, hence the gastroscopy often diagnoses anastomotic gastritis and residual gastritis. Over time, atrophic gastritis of the residual stomach is often prominent. Most of the stomach has been removed, and the function of the pylorus, which acts as a gatekeeper, has been lost, allowing the alkaline fluid of the small intestine to reflux into the stomach freely. Due to the strong

　　The prevention of residual gastritis should start from eating small and frequent meals, separating dry and wet foods, limiting sugar intake, and preventing anemia.

　　Eat small and frequent meals:After surgery, it is advisable to eat small and frequent meals, with 4 to 6 meals a day, so that the stomach does not become empty or bloated, adapting to the characteristics of reduced stomach capacity. Do not overeat. As far as possible, follow the provided meal times and quantities, and eat on time and in fixed amounts. Practice has proved that eating small and frequent meals can not only control digestion and absorption but also increase total calorie intake, preventing weight loss. Eating small and frequent meals, due to the limited amount of food each time, will not cause excessive expansion of the intestinal lumen,牵引 the residual stomach to produce a series of vasoconstriction symptoms. Limiting food and sugar intake will not cause a significant change in blood volume.

　　Separate dry and wet foods:Do not use soup and drinks during meals, as liquid drinks pass through the gastrointestinal tract too quickly, easily entering the small intestine with solid food. If drinks are used, they should be consumed about half an hour before or after meals, and lie down or adopt a lying position during meals, so that the contents of the jejunum can reflux to the residual stomach, reduce excessive expansion of the jejunum, and allow food to stay in the stomach longer, pass through the small intestine more slowly, and promote further digestion and absorption of food.

　　Limit sugar intake:In the early stage after gastric resection, due to the excessive sugar in the intestine, it can cause a large amount of intestinal fluid secretion, causing a sharp change in blood volume and producing a series of clinical symptoms. Therefore, the intake of carbohydrate foods should be appropriately restricted, and it is best to mix monosaccharides, disaccharides, and polysaccharides, extending the absorption time to prevent the occurrence of 'dumping syndrome'.

　　Prevent anemia:After gastric resection, due to the decrease in gastric acid, the upper part of the small intestine accelerates peristalsis, disturbing the physiological function of digestion, thus affecting the absorption of protein and iron, and thus iron deficiency anemia is prone to occur. Therefore, patients can eat more lean meat, fish and shrimp, animal blood, liver and kidney, egg yolk, soy products, and dates, green vegetables, sesame sauce, and other foods rich in protein and iron.

　　Reduce stimulation:Due to the weakened physiological function of the stomach after surgery, do not eat cold, hard, and fibrous foods, and avoid spicy and刺激性 strong seasonings such as pepper and mustard. It is strictly forbidden to drink strong alcohol or smoke.

　　1. Under endoscopy, multiple small elevations can appear in the corpus or antrum of the stomach, with or without central depression or erosive-like ulcers;

　　2. Histology: Histology is the science that studies the microstructure and related functions of the body. Histology has developed from macro to micro on the basis of anatomy with the emergence of microscopes. Histology studies the body at the tissue, cell, subcellular, and molecular levels. The manifestation is lymphocytic gastritis.

　　In summary, it is necessary to eat slowly, moderately, cleanly, finely, and lightly.

　　Should be slow. Chewing slowly can reduce the irritation of rough food to the gastric mucosa;

　　Should be moderate. Diet should have a rhythm, avoid overeating and eating without a fixed time;

　　Should be clean. Pay attention to dietary hygiene and prevent external microorganisms from attacking the gastric mucosa;

　　It is advisable to be detailed. Try to eat more delicate, easy-to-digest, and nutritious foods;

　　It is advisable to keep it light. Eat less rich, sweet, thick, greasy, spicy, and other foods, and drink less alcohol and strong tea.

　　The treatment of this disease mainly combines medication with dietary adjustment, with light and easy-to-digest food as the mainstay, avoiding spicy and刺激性 foods, and eating small and frequent meals. As for vegetable juice, it is best not to drink too sweet or too bitter ones.

　　The main treatment is mucosal protection and promotion of gastric motility. Generally, gastric motility drugs such as cisapride and domperidone, as well as sucralfate and magnesium trisilicate, are given. In severe reflux cases, Roux-en-Y bypass surgery may be required. Since it is mainly alkaline reflux, mucosal protective agents can be selected from various bile salt drugs. Sucralfate is a local active aluminum hydroxide salt with saccharose octasulfate, which can form a protective layer with the proteins on the mucosa, and the common dose is 4g/day chewed, for a course of 8 to 12 weeks. Simethicone is mainly composed of octasilicate montmorillonite, which can cover the mucosal surface and protect the gastric mucosa, commonly taken 3g dissolved in half a cup of water after meals, 3 times a day. Magnesium trisilicate (Dashi) has a layered structure arrangement, which can stop the damage of pepsin and bile acids to the gastric mucosa, especially suitable for those with alkaline reflux as the main cause. Taken 0.5g chewed, 3 times a day. Motility-enhancing drugs can be selected such as domperidone, cisapride, and mosapride. Residual stomach is a precancerous lesion, and for those with more than 10 years postoperative, endoscopic follow-up should be performed to detect residual gastric cancer early.

　　In one experiment, 48 cases diagnosed with residual gastritis by gastroscopy were given magnesium trisilicate 1.0g, 3 times a day, domperidone 10mg, 3 times a day, for a course of 4 weeks. The clinical symptoms before and after treatment, changes under gastroscopy, and adverse drug reactions were observed. The results showed that the combination of the above drugs effectively relieved the symptoms of residual gastritis in the patients for one course of treatment, with clinical symptoms gradually alleviating to disappearance, 30 cases (62.5%) cured, 18 cases (37.5%) improved, and no ineffective cases, with a total effective rate of 100%. Adverse reactions were rare. It can be concluded that magnesium trisilicate can combine with bile acids to protect the gastric mucosa, and domperidone can coordinate gastrointestinal motility to reduce bile reflux, and the combination of both can effectively alleviate the symptoms of residual gastritis, and is a safe and effective drug for the treatment of residual gastritis.