Frozen shoulder is a common name for frozen shoulder. Frozen shoulder is usually caused by age factor, chronic strain, degenerative changes of shoulder joint, endocrine disorders, etc. If the patient is accompanied by obvious discomfort symptoms, it is recommended to consult a doctor in time for treatment. 1. Age factor: the onset of frozen shoulder has a close relationship with the patient’s age, preferred in the middle-aged and elderly people, the increase in age is also a major cause of frozen shoulder. 2. Chronic strain injury: due to long time bad posture, excessive shoulder movement and long working hours, patients suffer from chronic strain injury to the soft tissues of the shoulder, which becomes the cause of frozen shoulder. 3. Degenerative changes of shoulder joint: the shoulder joint will undergo degenerative changes with age, and the increase of age will cause the decline of soft tissues and the weakening of bearing capacity for injury, and the trauma or disease of local soft tissues can also accelerate the degenerative changes of shoulder joint. 4. Endocrine disorders: the pathogenesis is still not completely clear, according to the onset of time and self-relief and other characteristics, it is considered that frozen shoulder may be related to endocrine disorders. There may be other causes of frozen shoulder, if the patient finds that there is frozen shoulder, it is recommended to go to the hospital in time for examination and targeted treatment by the doctor.