The reason for the frequent nighttime urination in men: 1, prostate hyperplasia, common in men over the age of 50 years old, because of the increase in prostate volume, when the enlarged glands protrude into the bladder cavity and urethral cavity, causing significant irritation in the bladder triangle, thus causing frequent nocturnal urination, accompanied by symptoms such as poor urination or bifurcation of urination and effort to urinate. It is advisable to have a prostate ultrasound and residual urine examination to further clarify. 2. When patients with prostatitis, they can also have frequent nocturnal urination, mostly seen in men between 25-40 years of age, and can be accompanied by frequent urination, urinary urgency, or with the discharge of white prostatic fluid when urinating. The actual fact is that you can find a lot of people who have been in the business for a long time. In addition to the factors of the prostate, it may also be due to the natural decline in kidney function, which causes concentration and dilution disorders, resulting in frequent urination.