Cold hands in winter may be caused by poor blood circulation and lack of yang qi. 1. Poor blood circulation: Our blood vessels also apply to the principle of heat expansion and cold contraction. Too low a weather in winter will lead to blood vessel contraction, and after blood vessel contraction, the flow of blood will slow down thus making the hands feel cold. Because people’s hands and feet are the furthest away from the heart, and the heart is the blood supply, so when the weather is cold, the hands and feet will be a little colder. 2. Insufficient yang qi in the body: commonly known as kidney yang deficiency, people with kidney yang deficiency are prone to cold hands in winter. People with cold hands can supplement kidney yang through dietary therapy and medication, it is recommended to eat more warm food, such as beef and mutton, etc., you can also take Jin Gui Ren Qi Pills. Doing more exercise during the day will also help to generate yang energy. If there is any discomfort, it is recommended to consult a doctor in time, under the guidance of the doctor for treatment, do not take medication on your own.