Dry mouth and dry throat are firstly considered to be caused by dry climate, salty food and large loss of body fluid after exercise, which should be relieved by timely hydration. In addition some disease factors, such as pharyngitis, diabetes, dry syndrome, urolithiasis, hyperthyroidism, etc., will also make patients appear dry mouth, dry throat, should be combined with other symptoms and examination, clear cause after treatment. 1, pharyngitis: pharyngitis is the most common disease that causes patients to appear dry mouth, dry throat, due to inflammation in the throat, mucosal gland secretion function decreases, secretions decrease, and then patients appear pharyngeal discomfort symptoms. Should be under the guidance of the doctor for drug treatment, common such as dexamethasone, compound borax solution, etc.; 2, diabetes: due to the high blood glucose content in the patient’s blood, increased osmotic pressure in the blood, patients are prone to dry mouth, dry throat and other uncomfortable symptoms, should perform glucose tolerance test and urine sugar test to confirm the diagnosis; 3, dry syndrome: due to the lower salivary gland lesions, patients appear dry mouth, dry throat symptoms, manifested as eating It is difficult to swallow solid food, in addition to dry eyes, tongue pain, weakness and other symptoms. Salivary flow measurement and keratoconjunctival staining can be performed to further diagnose; 4, urolithiasis: patients with urolithiasis have a dry mouth that is not relieved by how much water they drink, and the main clinical manifestation is excessive drinking. Because of the large amount of hypotonic urine, low specific gravity urine, resulting in frequent thirst and dry mouth, patients must often drink water, and even appear to need to get up at night to drink water, can be diagnosed by water prohibition pressurization test; 5, hyperthyroidism: due to increased secretion of thyroxine, resulting in the patient’s body metabolic rate increased, nerve excitability increased, and then increased heat production, heat dissipation accelerated resulting in excessive sweating, so often feel dry mouth and The patient may feel dry mouth and tongue. Thyroid function test and thyroid autoantibody measurement should be done to clarify the diagnosis; 6, other: patients with dry mouth symptoms are also seen in patients with depression and anxiety disorders, mainly due to both medication and psychological factors, clinically known as psychogenic thirst. In addition, respiratory system diseases such as chronic bronchitis, hematological system diseases such as iron deficiency anemia can also lead to reduced saliva production, dry mouth and burning sensation, which should be promptly diagnosed by a doctor.