The causes of salty mouth in patients are mainly poor oral hygiene, inflammation, dental caries, and other diseases, etc., as follows: First, poor oral hygiene: due to poor oral hygiene, no serious brushing and rinsing, so that the tongue surface and tooth surface in the mouth, a large amount of food residue, bacteria, there will be salty mouth feeling. Second, inflammation: inflammation in the mouth, such as periodontitis, wisdom teeth pericoronitis, and even periodontal local abscess, there will be a lot of inflammatory secretions and bacteria in the mouth, there will also be salty feeling in the mouth. Third, dental caries: If there are multiple teeth caries in the mouth, because dental caries is a place to hide dirt, it will lead to a large amount of food embedding, which will also cause the mouth salty symptoms. Fourth, other diseases: if suffering from diseases of tongue papillae, taste papillae, such as chronic linguitis, map tongue and other diseases, due to inflammation of the tongue papillae lead to taste dysfunction, will also induce the symptoms of salty mouth.