1.Blood stasis: pain in the lower back and legs like thorns, pain at a fixed place, light day and heavy night, stiffness of the lumbar plate, restricted rotation in pitching and tilting, refusing to press at the painful place. The tongue is dark purple, or there are petechiae, and the pulse is tight or astringent. 2. Cold and damp evidence: cold pain in the lower back and legs, unfavorable rotation, pain does not decrease when lying down, aggravated by cold and cloudy rain, cold limbs. Pale tongue, white or greasy coating, sunken and tight or moistened pulse. 3. Damp-heat evidence: pain in the lumbar region, weakness of the legs, heat sensation in the painful area, increasing pain in hot or rainy days, decreasing pain after activity, vicious heat and thirst, short and red urine. The moss is yellow and greasy, and the pulse is moist or string-like. 4. Liver and kidney deficiency: lumbar pain, weakness of legs and knees, worse with exertion, relieved by lying down. In case of Yang deficiency, the face is white, the hands and feet are not warm, less breath and lazy speech, the waist and legs are cold, or there is impotence, premature ejaculation, women with thin belt, light tongue and sunken pulse. In case of Yin deficiency, dry throat and thirst, flushed face, tiredness, sleeplessness, dreaminess or seminal emission, women with yellowish odor, red tongue with little coating and thin pulse.