More frequent urination at night is seen in older men for reasons such as prostate enlargement, urinary tract infections, overactive bladder syndrome, and diabetes mellitus. 1. Prostatic hyperplasia: prostatic hyperplasia is mostly seen in elderly men, after prostatic hyperplasia, it will compress the urethra causing patients to experience urinary discomfort symptoms such as frequent urination, incomplete urination, and increased frequency of nocturnal urination. 2. Urinary tract infection: urethritis, cystitis patients, due to inflammation continues to stimulate the urinary tract will also cause frequent urination, increased frequency of nocturia, and even with urinary pain, urine routine examination will find that the white blood cells are significantly elevated. 3. Overactive bladder syndrome: bladder sensitivity, overactive bladder can lead to increased nocturia, and in severe cases, can also lead to urinary incontinence. 4. Diabetes mellitus: diabetes mellitus patients with elevated blood glucose, osmotic diuresis, will lead to frequent urination, increased nocturia, measurement of blood glucose can be clear. Overall, the causes of increased nocturia are more, such as increased urination at night, you need to go to the hospital in time for examination and treatment.