Salty mouth refers to the feeling of salty taste in the mouth as if it contains salt, which is related to the increased content of sodium, calcium and magnesium in saliva. Chinese medicine believes that salty mouth is mainly due to kidney yang deficiency and kidney yin deficiency, while Western medicine believes that salty mouth is due to dehydration, mouth ulcers and gastrointestinal tract dysfunction and other diseases. I. Chinese medicine: 1, kidney Yang deficiency: patients who have symptoms such as fear of cold, cold extremities, mental fatigue, hypertrophy of the tongue, sunken pulse, etc., belong to the kidney Yang deficiency, which may cause the symptoms of salty mouth; 2, kidney Yin deficiency: patients who have symptoms such as dizziness, tinnitus and fine pulse, etc., belong to the kidney Yin deficiency, patients may also have a salty taste in the mouth. Second, Western medicine: 1, dehydration: dehydration is a common cause of salty mouth, because dehydration will appear dry mouth, water and salt metabolism disorders, etc., causing salty mouth; 2, mouth ulcers: may be due to ulcer surface exudation of cellulose and necrotic cell carcasses, may lead to salty mouth, but most mouth ulcers are not specific taste; 3, gastrointestinal tract dysfunction: such as gastric esophageal reflux disease, due to the reflux of food in the stomach into the esophagus when lying down, patients are prone to strange or salty taste in the mouth; 4, abnormal nerve function: sensory nerve disorders, seen in various causes of peripheral sensory neuropathy, or central nerve abnormalities, can make patients feel a strange or salty taste in the mouth. In addition, usually do not pay attention to oral hygiene, or long-term emotional tension, anxiety and excessive work pressure, etc., can also make patients feel a strange or salty taste in the mouth.