The causes of lumbar muscle strain include weight bearing or poor posture in the lumbar region, degenerative muscle lesions, etc., which are characterized by lumbar pain and activity disorders. 1. Lumbar pain: when lumbar muscle strain occurs, the muscles, fascia, ligaments and other tissues around the affected area can be painful, and the pain can be aggravated after exertion and intensified when exerting oneself by sneezing, coughing, etc. The symptom will be relieved after resting, but recurrent episodes will occur. 2. Activity disorders: activity disorders are mostly caused by pain stimulation, especially when the patient’s forward flexion, backward extension, lateral extension, lumbar muscles can appear irritating pain, so the patient dares not to carry out these movements because of pain stretching, and the symptomatic characteristics of activity limitation. Some patients also have a low skin temperature on the surface of the affected lumbar area, and the patient feels that the skin is cold and the muscles are weak. The symptoms of lumbar muscle strain, it is recommended to go to the regular hospital in time, timely treatment.