In 1982, medical experts concluded that H. pylori infection is the main cause of chronic gastritis, closely related to ulcers in the peptic tract, and is one of the causes of gastric cancer. This view has become a hot topic in the digestive community, especially the relationship between H. pylori infection and the occurrence of gastric cancer, not only the medical community concern, and many patients read some popular science books, worried, often consulting doctors: infected with H. pylori is not easy to get gastric cancer? Proper understanding of H. pylori Helicobacter pylori is a spiral-shaped bacteria that exists in the acidic environment of the stomach and duodenum in the human body, and 80% of gastric ulcers and 90% of duodenal ulcers are triggered by this bacteria. However, most people infected with H. pylori do not show symptoms, and only a small percentage will develop further stomach or duodenal disease. Relationship between H. pylori and diseases Currently, H. pylori has been identified to be closely associated with four diseases in the upper gastrointestinal tract: 1. chronic gastritis; 2. peptic ulcer disease; 3. gastric cancer; 4. gastric mucosa-associated lymphoid tissue-like (MALT) malignant lymphoma. Eradication of H. pylori can cure peptic ulcer and prevent recurrence of ulcer. The World Health Organization has listed H. pylori as the number one carcinogenic factor of gastric cancer. The results from the world epidemiological survey show that there is a correlation between H. pylori infection and gastric cancer. The survey found that the rate of H. pylori infection was higher in patients with early gastric cancer than in controls. People infected with H. pylori are almost four times more likely to develop gastric cancer than those who are not infected. However, people should not be too nervous because there are many strains of H. pylori, and not all infections with H. pylori necessarily lead to gastric cancer. Only strains that are very virulent and have a high chance of causing cancer are likely to cause stomach cancer. Infection with H. pylori should be out of two misconceptions a. It does not matter. There are still 50% of normal people with bacteria. Second, very nervous, afraid of cancer. When gastroscopy detects H. pylori or blood sampling for anti-H. pylori antibody positive, clinical symptoms such as stomach pain, bloating, acidity, belching, bad breath; gastroscopy with superficial, erosive gastritis, gastric ulcer, gastric polyps, etc.; pathological histological examination with chronic superficial gastritis, mucosal inflammatory infiltration phenomenon, six months after the mucosal epithelial hyperplasia, glandular atrophy, cystic change and intestinal growth, two years later, mucosal glands can be abnormally proliferated, and if not reversed by timely treatment, cancer will occur in very few people. Therefore, when having the above three phenomena, sterilization and eradication should be performed.