Frozen shoulder is an unexplained, self-limited, aseptic inflammation of the soft tissues around the shoulder joint, with pain mainly around the shoulder joint. Frozen shoulder is also known as “fifty shoulder” because it occurs around the age of fifty. The pain is mainly around the shoulder joint and can be aggravated at night. Due to the adhesion of the joint, the patient’s active and passive movements of the shoulder joint can be limited. Due to different conditions, some patients’ pain worsens when performing shoulder abduction, external rotation, dorsiflexion and internal rotation, and the pain can spread to the anterolateral part of the shoulder and the upper and middle part of the upper arm, and sometimes reaches the surface of the flexor muscles of the forearm. Patients with frozen shoulder should actively seek medical advice and receive treatment as early as possible, which can effectively reduce shoulder pain. Under the guidance of the doctor, active shoulder rehabilitation training can be carried out to improve the range of motion of the joint, reduce the adhesion of the joint and promote the recovery of frozen shoulder.