Lumbar pain and leg soreness may be the precursor of lumbar disc herniation, lumbar spine tumor, lumbar and hip myofasciitis and other diseases. 1. Lumbar intervertebral disc herniation: mainly due to different degrees of degenerative changes in various parts of lumbar intervertebral discs, it often causes symptoms such as lumbar pain, leg soreness and numbness due to nerve compression. 2. Lumbar spine tumor: mainly due to the gradual growth of the tumor, which causes local compression, especially when the nerve root is compressed, it is possible to feel back pain and leg soreness. 3. Myofasciitis of lumbar and hip area: it may be due to cold or over exertion leading to local aseptic inflammation, which often causes lumbar pain and may also be accompanied by leg pain. Low back pain and leg soreness may also be a precursor to other diseases, it is recommended to go to the hospital in time, after clarifying the cause, targeted to take treatment or treatment.