A carbon 13 breath test result of 11.9 dpm indicates H. pylori infection. The normal value of carbon 13 breath test is 0-4 dpm, and if the result of carbon 13 breath test is greater than 4 dpm, then it reaches the positive standard, suggesting the presence of H. pylori infection. It can be treated with medication, it is recommended to take oral omeprazole, clarithromycin, bismuth potassium citrate, amoxicillin capsules, etc. After two weeks of treatment, stop taking the medication, and after one month, review the carbon 13 breath test to make sure that H. pylori is cleared or not. During the medication, you should pay attention to your diet, not to eat spicy and stimulating food, and drink more water to promote excretion. In addition, clinically, in addition to determining whether H. pylori is infected based on the test value, the results of gastroscopy and accompanying symptoms will also be used to make a comprehensive judgment. If the carbon 13 breath test results are abnormal, it is recommended to go to a regular hospital in a timely manner, after clarifying the cause of the disease, under the guidance of the doctor for targeted treatment or therapy.