The main causes of lumbago are related to structural changes in the lumbar vertebrae, osteoarthritic diseases, degenerative diseases, overwork or exposure to cold. 1. Structural changes of the lumbar vertebrae: If there are abnormal structural changes of the lumbar vertebrae, such as osteophytes, spinal stenosis or herniated intervertebral discs, etc., they may compress the nerve roots, which may cause the symptoms of lumbar soreness and leg soreness. 2. Bone and joint diseases: When there are abnormal lesions in the lumbar joints or lower limb bone and joints, such as inflammation, etc., it is easy to cause symptoms of soreness and pain, and even produce the problem of limited joint movement. 3. Degenerative lesions: If the lumbar vertebrae and the joints of the lower limbs have degenerative lesions, it is easy to directly stimulate the surrounding tissues, thus triggering the symptoms of lumbar and leg pain, and may even affect the motor function. 4. Excessive exertion or cold: usually, if you bend over for a long time to bear the weight of labor or strenuous exercise, it is easy to cause lumbar and leg muscle fatigue, thus generating the symptoms of soreness. If the waist and legs do not pay attention to warmth, long time cold, easy to affect the blood circulation, so as to produce the performance of lumbago and leg pain. Usually pay attention to appropriate exercise, if the symptoms are more obvious, need to be examined first to clarify the cause of the disease, and then standardized treatment under the guidance of the doctor.