In daily life, patients are often treated as having frozen shoulder with pain in the shoulder joint, significantly reduced range of motion, and especially difficulty lifting the arm. According to the American Sports Medicine Association, frozen shoulder is actually a form of adhesive capsulitis and is a self-limiting disease. The incidence of true frozen shoulder is quite rare, with rotator cuff injuries being the most prevalent shoulder disorder, followed by acromioclavicular impingement and shoulder instability. Frozen shoulder, in essence, is adhesive capsulitis. It is a condition in which the soft tissues of the shoulder muscles, tendons, ligaments and joint capsule become congested and edematous. Frozen shoulder mostly develops unilaterally, but a few patients may have bilateral onset at the same time. The age of onset of frozen shoulder corresponds to the age of severe degeneration of the shoulder joint, with a history of injury or local external fixation, cold, or hemiplegia, or without any causative factors. The main symptoms are shoulder joint pain, muscle weakness, and impaired movement. Pain is the most obvious symptom and has a persistent nature. The pain increases at night and even wakes up in pain, affecting sleep.