The H. pylori test can be done with a small amount of plain water. The test is required to be done on an empty stomach, but it can be done 2 hours after a meal and will not affect the test results, so it is okay to drink a small amount of water. The preferred test for H. pylori is the carbon 13 or carbon 14 breath test, which is a non-invasive test and does not require an electronic gastroscope, so it is more acceptable. If the patient chooses to do a venous blood test for H. pylori antibodies, he or she can also drink water, but the test results are not very accurate, so the breath test is more recommended. Patients who have H. pylori infection need to be given medication for H. pylori under the guidance of a specialist, as appropriate, who needs to be consulted.