H. pylori is a bacterium that colonizes the stomach and has the following symptoms: 1. It can cause chronic gastritis, peptic ulcer and even gastric cancer; 2. It can cause epigastric fullness and discomfort, pain and bloating, often accompanied by indigestion symptoms, including oral odor, acid reflux, belching, and sometimes severe epigastric pain and even symptoms of acute upper gastrointestinal bleeding. Early detection and treatment of H. pylori can help prevent the occurrence of such diseases. H. pylori is usually transmitted orally, reaching the stomach through eating unclean food, which can cause bacterial colonization and cause H. pylori infection.