Weakness of legs belongs to the category of impotence in Chinese medicine. Impotence can be based on liver and kidney deficiency, dampness and heat immersion, spleen and stomach weakness, such as the use of Tiger Submarine Pills, Ermiao Pills, ginseng ling baijushu san and other traditional Chinese medicine prescription symptomatic treatment, generally follow the doctor’s instructions on the symptoms of the efficacy of the medication are better. 1. Liver and kidney deficiency: manifested as limb impotence and weakness, especially the lower limbs, waist and knee weakness, not able to stand for a long time, and even walk all the waste and so on. Can use tiger submarine pill (from the “danxi xinfa” volume three), the formula by the ripened rhubarb, tortoise shell, tiger bone (with the dog bone instead of), white peony, mother of pearl, cypress, lock yang, chenpi, dry ginger, can tonic liver and kidney, nourish yin and clearing the heat, treatment of the lower limbs impotence and weakness. 2. Dampness-heat immersion: the clinical manifestations of the disease is slow onset, gradually appeared limbs heavy (limb weakness, sinking), impotence and weakness, etc., Ermiao Pill has the effect of clearing heat and drying dampness, can be used for the treatment of pain in the tendons and bones, or impotence and weakness of the feet and other symptoms, this prescription consists of cypress, Cangzhu. 3. Weakness of the spleen and stomach: mainly manifested as slow onset of the disease, limb weakness gradually aggravated, fatigue (lack of spirit) limb fatigue, muscle atrophy, lack of energy and lazy speech (lack of strength, do not want to talk), etc., can be used ginseng and atractylodes, the formula consists of ginseng, atractylodes, poria and other herbs, with the tonifying the center of the qi (through the spleen by means of the method of treatment of qi deficiency), spleen and ascension of Qing’s efficacy. The above prescription should be taken under the doctor’s diagnosis and should not be used privately as it may cause damage to the organism. If the disease is not relieved, it is necessary to follow up with the doctor to change the medication.