Shoulder and back pain may be caused by physiological factors such as overloading the shoulders and improper sleeping posture, or it may be caused by cervical spondylosis, frozen shoulder, and other diseases such as rotator cuff injury. 1. Physiological factors: Excessive weight-bearing labor in daily life or improper postures when sleeping or working and studying can lead to shoulder and back pain. 2. Cervical spondylosis: Most of the cervical spondylosis is caused by long-term strain injury of the cervical spine, ligament hyperplasia and other factors. The main symptoms are neck and back pain, stiffness, rigidity, etc., which may lead to shoulder and back pain. 3. Frozen shoulder:The cause of frozen shoulder is not yet clear, and it is considered to be caused by various diseases such as synovitis. Symptoms such as pain around the shoulder joint, limited movement and stiffness may occur. 4. Others:Rotator cuff injury, angina pectoris, pleural adhesion and other diseases may also cause shoulder and back pain. When the symptoms of shoulder and back pain appear, you should consult a doctor in time, clarify the cause of the disease and follow the doctor’s instructions for treatment.