In winter, the temperature in the north is gradually falling, many patients who come to the clinic describe that they are usually quite good, once the winter weather is cool, this frequent urination. Then why do men love to urinate frequently in winter? First of all, the normal adult urine volume per day is mostly between 1000 to 2000 ml, more than 2500 ml is polyuria. The average daytime urination 4 to 6 times, 0 to 2 times at night after bedtime, more than the number of times above, is generally considered frequent urination. Our ancients have long observed this problem, and there is a cloud in the Nei Jing: “The cold of the day is the coup closed, the gas and humidity do not work, and the water stays in the bladder, then it is drowning and gas”. It means that frequent urination in winter is a manifestation of cold weather, lack of yang energy and unfavorable bladder gasification. The human body can have both sweat evaporation and urination to discharge water in summer with the same amount of water to drink, and the amount of urine will increase accordingly in winter when sweat evaporation is reduced. In addition, in the case of men, the cold winter weather can make sympathetic excitability increase, prostate gland contraction, glandular canal and vascular expansion, resulting in increased pressure in the urethra, which in turn will aggravate the accumulation of prostate fluid, making symptoms such as frequent and urgent urination more pronounced. If persistent polyuria occurs, diseases caused by secretory metabolic disorders, including pituitary uremia, diabetes mellitus, and primary aldosteronism, should be considered. In addition, for long-term frequent urination with painful urination and urgency, consider inflammatory irritation such as cystitis, urethritis or urinary stones. Therefore, don’t carry on when you feel cool, pay attention to keep your lower body warm, wear autumn pants earlier, keep a warm environment locally can make the prostate drainage smooth, reduce muscle tissue contraction, so that the prostate congestion, edema state is restored, thus alleviating the symptoms of frequent urination. If the symptoms of frequent urination are obvious and last for a long time, you should seek medical attention to identify the cause to prevent delay.