A positive carbon 14 breath test value of 166 indicates infection by H. pylori, a disease that can be cured, so it is not serious. Helicobacter pylori is a gram-negative bacterium that often parasitizes the gastric mucosa, and it not only causes destructive damage to the mucous membrane of the stomach wall, but is also the main cause of gastritis, as well as gastric ulcers and gastric cancer. Clinically, there are usually symptoms such as heartburn, acid reflux, nausea, belching, poor appetite and bloating. Currently, the diagnosis can be confirmed by carbon 13 and carbon 14 breath test, gastroscopy sampling, and immunological testing. Helicobacter pylori infection in the treatment mode, generally take two antibiotics, with proton pump inhibitors, bismuth and other drugs combined drug therapy, commonly used drugs are amoxicillin, clarithromycin, omeprazole, bismuth potassium citrate and so on. Generally most of them can be cured by regular treatment, so it is not serious. In summary, if there is a carbon 14 breath test positive value of 166, it is recommended to seek early medical treatment, under the guidance of the doctor formal treatment.