Why do we urinate more often in cold weather.?

Answer 1

A common symptom of cold weather is its effect on urine

production. Exposure to cold causes a reduction in blood flow to the

surface of the skin by constriction of blood vessels. This reduces the overall

volume of the circulatory system so increasing the blood pressure. The body's

response to this is to reduce the fluid volume by getting rid of water in the

urine. So when you get cold, you want to pee. "

Usually human skin has a unique system to keep in equilibrium state with the surrounding temperature. During winter season, the temperature is low and the body temperature is should be heated to balance the tolerance. If our body is assumed as a vessel, its quite natural that a vessel without water gets heated up rapidly. So the water content in our body be sent out in the form of urine.

Answer 2

One theory is that in cold weather we tend not too sweat as much. The body needs an outlet for normal fluids and so we produce more Urine. The other is that exposure to cold causes a reduction in blood flow to the surface of the skin by constriction of blood vessels. This reduces the overall volume of the circulatory system so increasing the blood pressure. The body's response to this is to reduce the fluid volume by getting rid of water in the urine.