1, the concept: acute lumbar sprain is the lumbar muscles, fascia, ligaments and other soft tissues due to external forces suddenly subjected to excessive strain and caused by acute lacerations, often occurs when lifting heavy objects, lumbar muscles strong contraction. Most of them are caused by sudden indirect external force. Acute lumbar sprain can make the attachment point of lumbosacral muscles, periosteum, fascia and ligaments and other tissues tear. 2, pathological causes: many patients suffering from the disease still do not understand why they suffer from acute lumbar sprain. For acute lumbar sprain etiology, there are two main causes of lumbar soft tissue injury: (1) lumbar sprain: lumbar sprain is mostly caused by walking and slipping, jumping, flash twisting body, running, mostly due to muscle ligaments suffering from strain, so the injury is light. (2) lumbar contusion laceration: lumbar contusion laceration is a more serious injury, such as high climbing, lifting, carrying heavy objects in the process, excessive force or improper posture, with improperly caused by lumbar muscle fascia, ligaments, small intervertebral joints and joint capsule injury and tear. 3, clinical manifestations: patients have a history of lifting heavy objects, some patients complain of hearing a crisp sound. After the injury, the pain is so severe that the patient cannot move immediately; the lighter patient can still work, but the pain increases after rest or the next day, and even cannot get up. On examination, the patient is seen to have lumbar stiffness and loss of lumbar pronation, and may have scoliosis and sacrospinous muscle spasm. Obvious pressure pain points can be found at the injury site. 4.Treatment suggestion: low back pain may be caused by a variety of diseases, among which acute lumbar sprain, lumbar muscle strain and lumbar intervertebral disc herniation are the most common. Therefore, if a similar condition is found, you should consult a doctor in time to make a clear diagnosis, exclude the possibility of other factors, and examine carefully to prevent missing the diagnosis and avoid delaying the condition. Some patients are blindly treated without proper diagnosis and lose the best time for treatment. After a lumbar sprain, rest in bed (hard bed), local hot compress or external application of blood-strengthening and pain-relieving ointment, intervertebral small joint synovial imbrication can be treated by manipulation, while taking internal Chinese medicine to move qi and blood, consolidate the lumbar pain, late functional exercise and rehabilitation health care is also essential, with the correct functional activities, the formation of a good habit of life.