Elderly people who feel cold wind on their legs consider that it is related to insufficient qi and blood, as well as spleen and kidney yang deficiency (deficiency of yang qi in the spleen and kidneys), and wearing fewer clothes, among other factors. 1. Qi and blood insufficiency: When there is insufficiency of qi and blood due to old age, the function of warming and moistening of the lower limbs decreases, and the symptom of feeling cold wind on the legs may occur. 2. Spleen and kidney yang deficiency: Spleen and kidney yang deficiency leads to a decrease in warming function and the manifestation of coldness, such as cold pain in the waist and abdomen, feeling cold wind on the legs. 3. Underdressing: This is either due to underdressing in cold climates, which can be relieved by adding more clothing. 4. Invasion of external evil: such as wind and cold evil attack on the human body, the elderly will also feel cold wind on the legs. In addition to the above factors, do not rule out other factors caused by the patient is recommended to go to the hospital as soon as possible to check by the doctor to clarify the cause of the disease, to give targeted treatment.