Patients with lumbar muscle strain usually involve pain on both sides of the lumbar region and pain in the lumbosacral region. 1. Pain on both sides of the waist: lumbar muscle strain is mostly caused by accumulated, mechanical and chronic injuries to the muscles, fascia, ligaments and other soft tissues of the waist. As there are more muscles on both sides of the waist, over-exertion will cause a large amount of lactic acid to accumulate in the local area, thus causing clinical symptoms of pain and swelling on both sides of the waist, and sometimes the pain will also radiate to the buttocks. 2. Lumbosacral pain: Due to overwork and tension of the muscles on both sides of the waist, the protection of lumbar vertebrae will be lost, which will cause lumbar vertebrae hyperplasia or degeneration over time, resulting in obvious pain in the lumbosacral region, which may lead to mild limitation of lumbar and leg activities in severe cases. If the above symptoms occur, it is recommended to consult a doctor in a timely manner and under the guidance of the doctor, so as not to delay the condition.