The main symptom of lumbar muscle strain is pain in the waist or lumbosacral region, which occurs repeatedly. Pain can change with climate change or fatigue, sometimes light and sometimes heavy, lingering. There may be extensive tenderness in the waist, and there is no abnormality in spinal activity. At the time of acute attack, various symptoms are obviously aggravated, and muscle spasm, scoliosis and limited functional activities may occur. Some patients may have lower branch traction pain, but there is no string pain and skin numbness. The nature of pain is mostly dull pain, which can be confined to a certain part or spread all over the back. Waist pain or swelling pain, some tingling or burning pain.