Drinking water or dry mouth may be related to excessive water loss, diabetes, hyperthyroidism, etc., and need to be treated with general treatment, medication and surgery. 1. For those caused by excessive water loss, avoid eating salty food and pay attention to replenishing water. 2. For diabetes, oral metformin, glibenclamide, Raglanide, acarbose and other hypoglycemic drugs or insulin injection can be taken as prescribed by the doctor; for obese patients with type 2 diabetes, bariatric surgery is feasible to play a role in controlling blood sugar. 3. For hyperthyroidism, oral propylthiouracil antithyroid medication, iodine solution and other iodine agents such as compound iodine solution, and beta-blockers such as metoprolol can be taken as prescribed by the doctor; if malignant lesions are suspected and there are pressure symptoms, subtotal thyroidectomy or total thyroidectomy is feasible. 4. Dry mouth caused by dry syndrome, can use artificial saliva and other symptomatic treatment. It is recommended to drink water or dry mouth in time to go to the regular hospital, clear cause, if you need treatment, should be standardized under the guidance of the doctor, the use of drugs need to follow the doctor’s instructions.