Pain in the left side of the back may be caused by the following reasons: 1) trauma or fracture of the lumbar spine and deformation of the spine, which may cause pain in the back; 2) problems in the lumbar spine, such as lumbar disc herniation or lumbar spine osteophytes, as well as lumbar muscle strain and lumbar spine slippage disease, which may cause pain in the back; 3) inflammation of the fascia or stimulation by wind and cold, which may cause pain in the back. The pain can be triggered by inflammation of the fascia or stimulation by wind and cold. After the emergence of the left side of the lumbar pain, patients can be localized acupuncture, as well as infrared radiation or localized hot compresses, massage to relieve.