Two legs cold and weak is generally due to kidney qi deficiency or kidney yang deficiency caused by Chinese medicine, kidney bone, kidney deficiency is weak and weak legs, qi deficiency can not promote yang qi transportation to the limbs, yang deficiency can not warm the limbs of the legs cold. 1. Kidney qi deficiency: patients with kidney qi deficiency are generally due to plain overwork, depletion of qi and blood, resulting in kidney qi deficiency, qi deficiency can not promote the operation of yang qi, then see the limbs cool, legs, soreness and weakness, cold limbs cold (fear of cold, cold limbs), fatigue and fatigue and other symptoms. 2. Kidney yang deficiency: patients usually do not pay attention to keep warm or work and live in a cold and damp environment, damage to kidney yang, resulting in kidney yang deficiency, can not warm the limbs, see the legs cold, aching and weak, cold pain in the waist and knees, urinate long, fear of cold limbs (fear of cold, cold limbs) and other symptoms. Clinical many diseases can lead to the symptoms of cold legs, weakness and weakness, it is recommended that the patient in a timely manner in the regular hospital, under the guidance of the doctor’s diagnosis and treatment of medication, do not take their own medication to delay the condition.