When the weather is cold, the symptoms of frequent and urgent urination are likely to occur. Possible reasons: 1. From a Western medical point of view, when the weather is cold, less water evaporates from the skin and respiratory tract, and relatively more water is retained in the body. The blood volume increases after drinking water, and the amount of blood filtered by the kidneys also increases, when the filtration capacity of the kidneys is relatively strengthened, and the urine produced is relatively more. Therefore, the symptoms of frequent and urgent urination after drinking water in cold weather may be related to increased filtration by the kidneys. In hot weather, the skin and respiratory tract should evaporate more water, when the blood flow through the kidneys is relatively cold weather less, so the hot weather after drinking water is not obvious, but the cold weather is obvious. 2, from the point of view of Chinese medicine, cold weather, cold main collection, cold main clear long, so the kidney collection ability is relatively lower, resulting in the urine appears clear long, cold weather, the kidney Yang Qi is slightly insufficient, so The lack of water intake leads to increased urination and frequent urination, especially when we get older.