Gastroscopy HP is mainly used to diagnose whether there is H. pylori infection, and the plus sign indicates that there is infection, and the more plus signs indicate more H. pylori infection, but it cannot diagnose whether it is gastric cancer. HP, or Helicobacter pylori, is a spiral, gram-negative bacillus that is mainly transmitted through the digestive tract and lives in the stomach and duodenum, and is associated with chronic gastritis, peptic ulcer, gastric cancer and other digestive tract diseases. After infection, patients may experience a variety of digestive discomfort reactions such as bloating, abdominal pain, belching, acid reflux, and indigestion. Once a patient is diagnosed with the presence of H. pylori, he or she should be treated promptly with eradication therapy, and a quadruple regimen is currently advocated, which is a combination of a PPI (proton pump inhibitor), two antibiotics and a bismuth agent. If patients need to clarify the presence of gastric cancer, it is recommended to visit the gastroenterology department to clarify the diagnosis through gastroscopy and other examinations. Patients who undergo gastroscopic biopsy are advised to have a proper semi-liquid diet, such as drinking congee, noodles in soup, ravioli, etc., for 1-2 days after the examination, avoiding raw, cold, hard and irritating food to avoid inducing bleeding from the trauma.