The C14 breath test is a non-invasive test that detects H. pylori infection. the price of the C14 breath test is generally between 150 and 200 yuan in tertiary hospitals, and may be around 100 yuan in secondary hospitals, but depending on the region and the level of the hospital, the charges may vary. The C14 breath test needs to be performed on an empty stomach, so it is recommended that you do not eat too much fatty food the night before the test, ensure a good sleep, and do not take some medication for H. pylori, otherwise it will affect the test results and there is a possibility of false negatives. H. pylori infection can cause various gastric diseases, such as chronic gastritis, gastric ulcer, duodenal bulb ulcer. Patients with these diseases should undergo C14 breath test to clarify the presence or absence of H. pylori infection. If there is H. pylori infection, scientific and standardized application of triple or quadruple therapy is needed to eradicate H. pylori.