Low back pain and sore legs appear for the following two main reasons: 1. It may be a herniated or bulging disc in the lumbar region, which produces extrusion and stimulation of the nerve structures in the lumbar region, resulting in a feeling of pain in the lumbar region. And accompanied by lower limb related nerve distribution area soreness and discomfort, bending, long squatting, sedentary, will feel the pain symptoms as well as acid symptoms aggravated. 2, may be the waist and legs due to excessive fatigue, and have a cold situation. For example, prolonged sitting, prolonged squatting, prolonged standing and prolonged bending and lifting heavy objects, resulting in the lumbar region showing excessive fatigue to form strain and gradually forming inflammatory lesions. The lesions stimulate the peripheral nerves around the lumbar area, and the pain in the lumbar area will appear. 3, leg pain is mainly due to cold, or inflammatory stimulation leading to local muscle tissue tension, lactic acid and inflammation and other metabolic products accumulation, it is easy to appear back pain and leg pain symptoms.