Increased nocturia and dry mouth may be caused by dietary factors, uremia and diabetes. 1. Dietary factors: If you eat too much food with high salt content during the day, you will be prone to thirst, which leads to drinking a lot of water and increased nocturia. 2. Uremia: when patients suffer from uremia, it will easily lead to reduced sensitivity of the kidneys to arginine pressin, lack of arginine in the body, etc., resulting in dysfunction of water reabsorption in renal tubules, and symptoms such as nocturnal polyuria, dry mouth, irritability, and so on. 3. Diabetes: Diabetic patients will be prone to high blood sugar levels, resulting in osmotic diuresis, dry mouth, thirst, nocturia and other symptoms. Patients with nocturnal polyuria and dry mouth should go to the hospital in time for consultation, after clarifying the cause of the disease, and standardize the treatment under the guidance of the doctor.