People with bad breath can be checked for H. pylori if they have ruled out oral and throat diseases and have a high suspicion that it is caused by digestive tract diseases. Most H. pylori infections also cause bad breath, as well as gastrointestinal disorders and dysbiosis of the intestinal flora. The common test for H. pylori is the breath test, also known as the carbon 13 or carbon 14 breath test, which is a non-invasive test. If the above tests suggest the presence of H. pylori infection in the stomach, the patient will need to be treated with medication or further gastroscopy under the guidance of a gastroenterologist to help understand the specific lesions in the stomach.