Some patients with H. pylori infection may experience symptoms such as upper abdominal discomfort, bloating, burping, belching (hiccups), and bad taste in the mouth, while others may have no symptoms. H. pylori infection is usually followed by discomfort such as fullness and pain in the epigastrium after eating, and often by belching (burping), bloating, acid reflux, and loss of appetite as well. Since H. pylori can survive in dental plaque and may produce smelly carbons, it may also cause symptoms such as bad taste in the mouth. Often infection with H. pylori may cause gastritis, peptic ulcers, gastric lymphoma, and other diseases. In case of abnormal H. pylori test results, it is recommended to consult a doctor in time to clarify the cause of the disease with the help of a doctor and to carry out targeted treatment or therapy.