The waist often feels strained, usually triggered by the following reasons: First, if the nature of the work requires a long time to maintain a sitting posture, it is easy to cause fatigue in the waist. The lumbar spine in a sitting position will be subjected to double the pressure, because the physiological curvature of the lumbar spine in a sitting position caused by the change, the disappearance of the physiological curvature of the lumbar spine will cause the ligaments around the lumbar spine to be stretched and damaged first, local blood circulation is impaired, the muscles around the lumbar spine, fascia and other soft tissues once the blood circulation is impaired, it will lead to local soft tissue ischemia, hypoxia and the feeling of fatigue. Second, if often bending labor or lumbar often stimulated by cold, it will lead to lumbar soft tissue edema, exudation, inducing local inflammation, inflammation at the beginning is the symptoms of strain and discomfort, as the inflammation increases there will be local pain symptoms.