To know how to do pectoral muscle asymmetry, we must first know what causes pectoral muscle asymmetry. The causes of pectoral asymmetry can be divided into two types, physiological and pathological. Physiologically caused pectoral muscle asymmetry, mostly due to excessive unilateral force during exercise or incorrect exercise posture, does not require treatment, just need to pay attention to the coordination of the two sides of the exercise force and correct posture, the two sides of the pectoral muscle will be able to restore symmetry. If the pectoral muscle asymmetry is pathologically caused, the pectoral muscle asymmetry is caused by injury to the sternum or rib cage or compression of local nerves, which leads to impaired blood circulation in the chest, resulting in insufficient blood supply to the chest. In case of pathological asymmetry of the pectoral muscle, the meridians of the chest must be unblocked in order to restore the symmetry of the pectoral muscle.