The colder the weather, why do some people feel more urine?

When the weather is hot, some water in the human body is excreted through the skin in the form of sweat. When the weather turns cold, the pores of human skin shrink, and the external environment is lower than the body temperature, so it is not easy to sweat. All water and excrement can only be excreted in urine.

Urine is excreted by water and toxins in the body through the kidneys and skin. In hot weather, a lot of sweat will flow out from exercise, so it will be excreted through the kidneys in hot weather, and most of it will be excreted through the skin. Because the amount of exercise in cold days is relatively small, most of it is excreted through the kidneys, so the urine in cold days is relatively more than that in hot days.

Therefore, when sweating heavily in hot days, people need to drink light salt water to keep the balance of electrolytes in the body and prevent heatstroke.

There are two main reasons: 1. The water discharged through the skin in winter is reduced (sweating often in summer); 2。 The cold weather leads to the decrease of antidiuretic hormone secretion in human body.

ADH: Also known as vasopressin, it is a peptide hormone synthesized by neuroendocrine cells in hypothalamus.

After synthesis, it is transported and stored in the nerve terminal granules in the posterior pituitary. When stimulated, nerve endings release it into the blood. The main physiological function of antidiuretic hormone is to increase the permeability of renal tubules and collecting ducts to water, and promote the reabsorption of water by renal tubules and collecting ducts, so as to concentrate urine and reduce urine volume.