A body with coldness in the kidneys is of the cold type, fear of cold, always having to wear many more clothes than others, and a tongue that is always white. There are also manifestations of Yang Qi deficiency in the body. When the weather is hot in summer, there are usually no symptoms, while in winter when the cold is heavy, there is already a deficiency of kidney yang and yang qi, which cannot reach the extremities, and the extremities are cold, with the double lower extremities being the most important, you can take medicines to nourish yang, such as Si Wei Tang. Usually, you can also eat foods that nourish yang, such as dog meat, mutton and so on. Symptoms of cold in the kidneys will also manifest in the urine, which may have a variety of variations. Heavy cold energy will turn Yang energy into water, and Yang deficiency will also turn cold energy into water, and deficiency of kidney energy will also cause urine not to be ingested. In winter, when the temperature is lower, the kidney cold is heavy, human physiology decreases, yang energy is weakened, and energy and nutrition requirements are higher. The way to maintain health in the cold to keep warm and improve resistance to disease. At this time should drink lychee black tea, lemon black tea, etc.