According to Chinese medicine practitioners, leg weakness can be seen in both kidney yang deficiency and spleen deficiency. 1. Kidney main bone marrow (refers to the kidneys control the generation of bone marrow, affecting the growth and development of bones), when the body of kidney essence is sufficient, the balance of kidney yin and yang, the muscles and bones are strong and powerful, and on the contrary, the kidney essence is insufficient, yin and yang imbalance, can not warm and moisten the muscles and bones, muscles and bones impotence and weakness, legs sore and weak and so on performance. Kidney yang deficiency patients can also appear waist and knee soreness and weakness (waist and knee soreness and weakness of the feeling) weakness and cold pain, cold fear of cold, cold limbs, edema, urinary incontinence (urination is not smooth) and other symptoms. 2. The spleen is the master of the limbs and muscles. When the spleen is deficient, it cannot transport the water and grains to the muscles, and the muscles of the limbs cannot be nourished by the essence, so there will be soreness and weakness. Spleen deficiency patients can also appear loss of appetite, do not think of food, abdominal distension, fatigue, fatigue, yellow face (face yellow and no luster), loose stools (feces thin not shaped) stools are not shaped and other symptoms. Patients with weak and aching legs are advised to go to regular hospitals for treatment under the guidance of professional physicians who can identify and treat the symptoms.