Unexplained lumbar pain may be caused by lumbar disc herniation, lumbar osteophytes, lumbar dorsal fasciitis and other diseases, or it may be caused by other diseases such as lumbar muscle strain. 1. Lumbar disc herniation: the main cause of lumbar disc herniation is degeneration of the intervertebral discs, and the main symptoms of the patients are recurrent low back pain, leg pain, cauda equina syndrome, numbness of the lower limbs, and sciatica and other symptoms. 2. Lumbar spondylolisthesis: Lumbar spondylolisthesis is formed due to the self-protection and repair of the spinal column, and patients will experience symptoms such as lumbar pain, swelling, stiffness, etc. In addition, lumbar spondylolisthesis is mainly caused by the degeneration of intervertebral discs. In addition, patients with lumbar spondylolisthesis may also experience symptoms such as numbness and pain in the lower limbs. 3. Lumbar dorsal myofasciitis: the etiology of lumbar dorsal myofasciitis is not yet clear, and it is considered to be related to long-term muscle strain. The main symptoms of lumbar dorsal fasciitis are pain and stiffness in the lower back, as well as spasm and limited movement. 4. Other: lumbar muscle strain, spinal tuberculosis and other diseases can also lead to patients with unexplained back pain. There are many reasons for patients to have unexplained back pain, and they should consult a doctor in time and follow the doctor’s instructions.