Men who urinate less during the day and more at night are considered to be a normal phenomenon, prostate hyperplasia, urinary tract infections and so on. 1. Normal phenomenon: If you drink more water before going to bed or eat some watery fruits, such as watermelon, etc., it may lead to an increase in the production of urine in the bladder to appear more urinary symptoms, usually no other discomfort, which is a normal phenomenon. 2. Prostatic hyperplasia: prostatic hyperplasia is common in men over 50 years of age, is a common disease that causes urinary disorders in middle-aged and elderly men, the pathogenesis is not particularly clear, the main manifestations of urinary frequency, urinary urgency, nocturia and urge urinary incontinence. 3. urinary tract infection: urinary tract infection and pathogenic microorganisms have a relationship, due to inflammation stimulation patients will appear urinary frequency, urinary urgency, urinary pain, some patients in the evening when the symptoms will be more obvious. Simply based on the daytime urine less night urine more, and can not be clear which disease, it is recommended to go to the hospital for a clear cause, and according to different reasons for standardized treatment.