Frozen shoulder may cause arm pain due to inflammatory stimulation, tissue adhesion and other reasons. Frozen shoulder is mostly seen in middle-aged and old people around 50 years old, which is caused by chronic inflammatory reaction of shoulder joint and surrounding tissues due to long-term over-activity, straining injury, trauma and other factors. The common symptoms of frozen shoulder include shoulder pain. Due to the spread of inflammatory factors and adhesion of soft tissues in the shoulder, the pain can radiate to the neck and upper arm and even the elbow, and the pain worsens at night, resulting in stiffness of the shoulder joint, difficulty in lifting and lack of strength in the upper limbs. If the symptoms of shoulder joint pain, stiffness and difficulty in movement persist without relief, it is recommended to consult a doctor in time, complete the relevant examinations, make a clear diagnosis and follow the doctor’s instructions for treatment.