Breath test to detect H. pylori is a relatively long-used method, there are two, one is the carbon 14 breath test, because it has a small dose of radiation, the price is also slightly lower, is 110 yuan. The carbon 13 breath test has no radiation and can be performed on minors and pregnant and lactating women, and is slightly more expensive, generally around$200. The pricing varies from region to region and is determined by the pricing of the local price bureau. In addition, the breath test for H. pylori needs to pay attention to a few points, one is that the patient needs to be in a state of not eating or drinking in the morning, and then if the patient has previously taken oral razoles, bismuth, and antibiotic drugs, the results are affected and can cause false negatives. Therefore, before performing the H. pylori test, the above drugs should be stopped for 2-4 weeks before performing the breath test.