The treatment of dry mouth should be based on the specific cause of the disease. If it is caused by dehydration, you can replenish water; if it is caused by diabetes, you need to control blood sugar; if it is caused by dry syndrome, you need to actively treat the primary disease. 1. Dry mouth may be hypertonic dehydration or isotonic dehydration, you can drink more water or saline, avoid high salt diet, if necessary, intravenous infusion of 5% dextrose injection to relieve. 2. If dry mouth is caused by diabetes mellitus, go to the endocrinology department to control blood sugar, take oral hypoglycemic drugs such as metformin if necessary, and inject insulin if necessary. 3. If dry mouth is caused by dry syndrome, we should go to the hospital, treat the primary disease, under the guidance of the doctor to take medication, usually to use prednisone and so on. There are many causes of dry mouth, and the treatments are different depending on the cause.