Patients with lumbar muscle strain can experience stiffness in the lower back. Lumbar muscle strain is caused by chronic cumulative injury, resulting in damage to the lumbar muscles, with congestion, edema, and inflammatory reactions in the muscles, resulting in localized swelling and pain, which can have an impact on function. Due to the inflammatory stimulation of the muscles there is a corresponding spasm and paroxysmal contraction of the muscles, which results in stiffness of the lumbar region. In addition, because patients with lumbar muscle strain, often produce pain, due to the protective state to prevent the lumbar region from stretching and pain, the special posture of the patient will appear, after a long time, will also cause the corresponding muscle stiffness of the lumbar region, and the symptoms of relatively unfavorable lumbar activities will appear.