H. pylori reaches the gastric mucosa through the mouth and settles in the stomach causing infection over weeks or months. Causes chronic gastritis, gastroduodenal ulcer, etc., takes years or decades. Many friends are worried about infection with H. pylori, how to test yourself for H. pylori: 1, symptoms of indigestion: not much to eat, easy to bloat, often accompanied by belching, nausea, heartburn, etc. 2, stomach symptoms: epigastric pain, gastric distension significantly aggravated, along with irregular pain, episodes of shorter and shorter cycles. 3, oral odor: severe cases often have a special oral odor that cannot be removed no matter how much cleaning is done. For example, halitosis, a significant portion is caused by H. pylori; 4, loss of appetite; 5, other symptoms: frequent hunger, if checked for hyperthyroidism, diabetes are not, consider whether H. pylori infection; drooling exclude stroke and other problems, you can consider whether H. pylori infection; body suddenly become thin, or even anemia, etc. can be checked to exclude H. pylori infection. Symptoms alone cannot determine whether the infection has H. pylori, the initial self-test is only to see whether they have upper gastrointestinal symptoms. Many people have no specific symptoms after infection, and a definitive diagnosis requires a hospital visit. In particular, if you have close contact with family members who are infected with H. pylori, it is recommended to do relevant laboratory tests to clarify the presence or absence of infection.