There are two reasons for the heavy taste of saliva: first, the hygiene of the mouth, there are dental calculus, gingivitis, the mouth is not hygienic can be manifested as a heavier taste of saliva. Second, Helicobacter pylori infection, Helicobacter pylori infection can be colonized in the stomach, but also in the oral cavity, when there is Helicobacter pylori infection, some patients manifested as epigastric discomfort, oral odor, bad breath and so on. The main thing is to observe whether there are dental calculus, gingival inflammation, to carry out carbon 13 or carbon 14 urease breath test, to observe whether there is H. pylori infection, and to carry out eradication treatment of H. pylori if necessary.