The causes of low back pain are many and complex, and the common causes of low back pain are roughly divided into the following categories: 1, ankylosing spondylitis and other rheumatic diseases cause low back pain: is due to the body produces autoimmune factors, damage to tendon attachment points, synovial membranes and other causes of low back pain. 2, due to the spinal bone and joint and its surrounding soft tissue disorders caused by their own: such as chronic strain of the lumbar muscles and tendons manifested as intractable pain, contusions, sprains caused by local injury, bleeding, edema, adhesions and muscle spasm caused by acute pain. 3, caused by internal organ disorders: such as kidney stones, acute and chronic nephritis cause upper back pain, infection and tumor of the uterus and its adnexa can cause lumbosacral pain. 4, caused by spinal cord and spinal nerve disorders: such as spinal cord tumor, myelitis, etc. caused by lumbago. 5, caused by mental factors: such as hysterical patients may also complain of lumbago as the main complaint, but there are no objective signs, or the objective examination and subjective narrative cannot be explained by physiological anatomy and pathological knowledge, this kind of lumbago is often a manifestation of hysteria. The common diseases of low back pain are as follows: 1. Ankylosing spondylitis: It is an immune disease, prevalent in adolescents, and easily misdiagnosed as disc herniation and sciatica. The disease has a wide range of pain and is closely related to climate and season. In advanced stages, the lumbar spine may become progressively curved and unable to straighten the back. Radiographs can reveal sacroiliac arthritis with a high rate of HLA-B27 positivity. 2, lumbar spine osteophyte degenerative bone disease: common in middle-aged and elderly people. There may be one or bilateral low back pain, often accompanied by sciatica, localized pressure pain in the lumbar spine and paravertebral area, and restricted activity. Long history of disease and slow development. 3, osteochondrosis: caused by endocrine disorder body calcium deficiency, mostly seen in middle-aged women. The range of lumbar pain is wide, often with muscle pain, limb weakness, lower limb bending deformation, etc. 4.Lumbar muscle strain: caused by trauma or overexertion. The pain is mostly in the lower back and is chronic, intermittent or persistent soreness. It is aggravated by exertion and improves after rest. 5, lumbar myofasciitis: mostly caused by rheumatic cold, lumbar pain is widespread, painful points are not fixed, like heat and fear cold, pain and climate change related. 6, hypertrophic spondylitis degenerative disease: the majority of elderly patients. The pain area is in the middle of the spine, with a wide range, heavier in the morning, relieved after activity, and relieved in case of heat. 8, lumbar disc herniation: closely related to trauma and strain, mostly seen in young and strong people with heavy physical labor and sedentary office workers. The pain is mostly in the lower back, accompanied by sciatica, leg pain, etc., and movement is limited. The pain increases when coughing and sneezing, and is relieved after bed rest. 9, lumbar spine tuberculosis tuberculosis infection: common in adolescents. The onset of the disease is slow, with vague pain, and the pain is limited to the 1st to 2nd lumbar vertebrae. It is accompanied by symptoms such as low fever, night sweats, weakness and loss of appetite. 10.Congenital lumbosacral structural abnormalities: pain after exertion. 11.Lumbar spine fracture: due to acute trauma. X-ray can confirm the diagnosis. 12.Lumbar tumor: pain, numbness and progressive lower limb sensation and movement disorders as well as urinary and fecal disorders. 13, mental factors: such as hysterical patients may also have lumbar disease as the main complaint, but there are no objective signs, or the objective examination and subjective narrative cannot be explained by knowledge of physiological anatomy and pathology. If your physician’s treatment according to lumbar strain is ineffective, it is recommended to see if there are other causes.