There are many reasons for the heavy taste of the mouth, such as too many dental calculus, thick tongue, Helicobacter pylori caused by digestive diseases, etc., according to the cause of the need for appropriate treatment, such as scaling, cleaning the tongue, for Helicobacter pylori treatment. 1. Excessive dental calculus can lead to heavy taste in the mouth. Dental calculus contains a lot of bacteria and food residues, which can lead to bad breath in the long term, so we need to remove dental calculus through scaling to reduce the taste in the mouth. 2. Tongue coating contains a lot of food residue which accumulates on the back of the tongue leading to a heavy taste in the mouth, which can be improved by brushing the tongue coating at the same time during the brushing process. 3. Helicobacter pylori infection can lead to digestive disorders, resulting in decreased digestive capacity so that the food in the stomach can not be well decomposed and thus emitted through the esophagus to the mouth, resulting in a heavy taste, at this time you can go to the Gastroenterology Department for treatment against Helicobacter pylori (a variety of antibiotics, and proton pump inhibitors, gastric mucosal protection agent synergistic use of medication). There may be other reasons for the heavy taste in the mouth. If the heavy taste in the mouth does not improve after scaling and cleaning the tongue, it is recommended to consult a doctor to find out the specific cause and then carry out targeted treatment.