Low back pain is a typical clinical manifestation of lumbar muscle strain injury, patients with lumbar muscle strain injury will have recurrent low back pain, usually not accompanied by organic changes. Therefore, it is a normal manifestation for patients with lumbar muscle strain injury to have low back pain. Lumbar muscle strain injury is caused by mechanical, chronic injury of lumbar muscles, fascia, ligaments and other soft tissues, or aseptic inflammation caused by acute lumbar sprains that are not treated in a timely manner and turn into chronic lesions. Typical clinical manifestations are recurrent lumbar pain not accompanied by organic changes. Treatment of lumbar muscle strain should correct bad habits, avoid excessive weight bearing on the waist, sedentary, standing, obesity, quit smoking and avoiding alcohol, strengthen the exercise of the muscles of the lower back; medication can be used non-steroidal anti-inflammatory drugs, such as celecoxib, but also can be used externally with diclofenac diethylamide emulsion. If the pain is fixed, you can also do closed treatment.