The test is mainly through the breath test to reflect, the presence of H. pylori infection in the digestive system means of examination, the test is non-invasive, easy to check, the accuracy is relatively high, is widely used in the examination of the digestive system H. pylori, the cost is about 100 yuan, the specific cost of the test, depending on the level of the hospital and the actual published price shall prevail. If you plan to do the carbon 14 breath test, you must pay attention to a light diet a week before the test, avoid oral omeprazole and other stomach acid inhibitors and antibiotic drugs, avoid spicy and stimulating foods on the stomach, and maintain oral hygiene. If the test is positive for H. pylori after active treatment, H. pylori may spread through digestive tract diseases, so if one person in the family is positive, others should also pay attention to the test.