If a patient has pain down the back, it may be due to the following causes: first, the patient may have fasciitis here, many patients may have trauma or cold and other factors, which may cause inflammation of the deep fascia here, then the patient may have pain in the lower back. Secondly, it is also common for patients to have muscle strains here. When patients do strenuous twisting activities of the lower back, it may cause small muscle strains here, which may lead to the above symptoms. Thirdly, it is also common for patients to have autoimmune related lesions, which may involve the sacroiliac joint and the lumbosacral region when patients develop ankylosing spondylitis, which can cause lower back pain. Fourth, this type of patient may also be due to nerve irritation associated with the lumbar spine, which may cause the above symptoms, in the case of a low lumbar disc herniation, or a slipped lumbar vertebra here, which may cause nerve root irritation, resulting in pain in the above areas.