Helicobacter pylori is closely related to the occurrence of chronic gastritis, gastric ulcers, and gastric cancer, but not everyone infected with Helicobacter pylori will develop chronic gastritis or gastric ulcers. Infections can be diagnosed with a breath test, where values more than twice the normal level, accompanied by symptoms of gastritis, gastric ulcers, stomach distension, stomach pain, and acid reflux, should be considered for antibacterial and stomach-protective treatment. Generally, with standard treatment, 90% of Helicobacter pylori can be eradicated within one to two weeks. However, reinfection is common as it can be found in food and utensils and transmitted through saliva. It is generally advised that children under 14 and individuals with low levels of Helicobacter pylori without obvious stomach inflammation symptoms do not require immediate treatment.