The causes of asymmetrical back muscles usually include scoliosis or unilateral muscular development of the back, which needs to be treated as soon as it is detected. Scoliosis may cause deformity of the entire back, affecting the growth and development of the back muscles and eventually leading to asymmetry of the back muscles. Patients need to seek medical attention to identify the cause of the disease and then carry out appropriate back muscle exercises to correct bad posture. In addition, the asymmetry of the back muscles may also be related to unreasonable fitness exercise, radical fitness exercise may lead to one side of the back muscle development, while the other side of the muscle is smaller, fitness exercise needs to be correct under the guidance of professionals to exercise, to avoid the body out of shape. There may be other reasons, it is recommended that the patient timely consultation, clear diagnosis and follow the doctor’s instructions for treatment.