The principle of treatment for frozen shoulder (frozen shoulder in the narrow sense) is to treat it in stages, depending on the stage of the frozen shoulder or the severity of its symptoms. If the diagnosis is timely and the treatment is appropriate, the course of the disease can be shortened and motor function can be restored early. However, in patients with frozen shoulder, especially those with severe joint contracture and joint dysfunction, who do not improve significantly with non-surgical treatment, surgical treatment can be considered. (l) In the early stage of frozen shoulder, the patient’s pain symptoms are heavy and the dysfunction is mainly caused by muscle spasm due to pain, therefore, the treatment is mainly to relieve pain and prevent shoulder dysfunction. To relieve the pain, the shoulder can be braked so that the shoulder joint can be fully rested; or physical therapy and closure can be used to relieve the pain; or oral anti-inflammatory and analgesic drugs can be taken, or topical antispasmodic and analgesic drugs can be applied. During the acute period, avoid massage and acupressure to prevent the pain from getting worse and the duration of the disease from getting longer. After the acute phase, massage can be used to improve blood circulation and promote local inflammation. (2) During the freezing phase of frozen shoulder, the main manifestation is joint dysfunction, and the pain is mainly caused by joint dysfunction. Treatment is aimed at restoring joint movement function. Physiotherapy, massage, and medical sports can be used to perform functional exercises to release adhesions, expand the range of motion of the shoulder joint, and restore normal joint movement function. Patients who take the initiative to perform functional exercises of the shoulder joint can achieve good results. (3) During the recovery period, the patient should continue to strengthen the functional exercise of the shoulder joint, increase the muscle strength, restore the disuse muscle atrophy that occurred in the first stage, and restore the normal elasticity and contraction function of the muscle to achieve the complete recovery of the shoulder joint function. Primary frozen shoulder (frozen shoulder in the narrow sense) is a clinical syndrome of unknown etiology. Existing studies have shown that frozen shoulder is an insidious synovitis with a severe fibrotic reaction. With the rapid development of arthroscopic techniques in recent years, the treatment of frozen shoulder has achieved good results due to its less invasive and effective features. Shoulder arthroscopy can be used not only to clarify the diagnosis and exclude other pathologies causing joint stiffness, but also to release the structures associated with limited shoulder motion with manipulation. Arthroscopic release is considered to be the most effective method available. With this procedure, we have gained a lot of clinical experience and the patient recovers quickly and is discharged from the hospital 1 day after the procedure with a normal range of motion in the shoulder joint.