Kidney deficiency can be categorized into kidney yin deficiency and kidney yang deficiency, both of which can lead to leg weakness and fatigue, and can be relieved by taking Chinese medicines such as Six-flavored Dihuang Pills, Zuo Gui Wan, Gui Sui Di Huang Wan and Yu Gui Wan. 1. Kidney yin deficiency: Weakness of the legs can be accompanied by hot flashes (a burst of heat), night sweating (abnormal sweating after going to sleep, but the sweating stops after waking up), and heartburn and heat (heat in the hearts of the hands and feet, and self-consciousness of the heart and chest), etc. You can take medicines to nourish yin and replenish the kidneys, such as Liufidihuang Pills and Zuo Gui Pills. Liu Wei Di Huang Wan and Zuo Gui Wan have the effect of nourishing Yin and tonifying the Kidneys, and can be used to treat diseases with symptoms such as lumbar and knee weakness (a feeling of weakness and tenderness in the lumbar and knee areas), bone vapor and tidal heat (a burst of heat, feeling that the heat is penetrating from inside the bones to the outside), and spermatorrhea and night sweating. 2. Kidney yang deficiency: weakness of the legs can be accompanied by a fear of cold, cold limbs, etc. You can take medicines that warm the kidney yang (warming and replenishing the yang energy of the kidneys), such as Gui Fu Di Huang Wan and Yu Gui Wan. Gui Fu Di Huang Wan and Yu Gui Wan have the effect of warming and tonifying kidney yang, and can be used for lumbar and knee soreness and weakness, cold limbs and frequent urination. When the patient’s leg weakness is difficult to be relieved, the patient should consult a doctor in time, under the guidance of a professional physician, the above drugs need to be taken under the guidance of a traditional Chinese medicine practitioner, and should not be used blindly on their own, so as not to cause damage.