H. pylori is a microorganism inside the stomach, it causes gastritis, gastric ulcer, and if not treated well, stomach cancer may occur. How to kill Helicobacter pylori, previously used triple therapy, is the use of two antibiotics plus a proton pump inhibitors, two antibiotics, generally with amoxicillin or gentamicin, proton pump inhibitors, the use of omeprazole, pantoprazole, rabeprazole and so on, this is the triple therapy. Nowadays, quadruple therapy is advocated. Quadruple therapy is the active treatment with two antibiotics, plus proton pump inhibitor, plus acid bismuth suppressant. Generally the course of treatment should be at least fourteen days, after fourteen days, then take a month of proton pump inhibitors, and then recheck the carbon-14 blow test to see if there is still H. pylori infection.