Middle-aged and elderly people with back and leg pain is mostly caused by joint degeneration, but also may be due to lumbar disc herniation and the pain. Because the resistance of middle-aged and old people is low, they must be alert to bone tumors, so middle-aged and old people should go to the hospital in time once they have back and leg pain. Take X-ray of the corresponding parts to see if there is a possibility of bone tumor, if there is no bone tumor you should check the corresponding parts of the nuclear magnetic or other tests. For example, if you have knee pain, you can check the knee MRI to see if there is meniscus damage, articular surface, articular cartilage damage and so on. Lumbar pain with leg pain need to check the lumbar disc nuclear magnetic to see whether there is intravertebral compression, whether there is nerve root compression and so on.