Frozen shoulder is a very general reference, and its diagnosis needs to be refined in order to achieve the best treatment results. Generally speaking, shoulder pain mainly includes the following types: 1. frozen shoulder, also known as fifty shoulder, usually occurs in the age of 50 or so, its typical performance is the shoulder joint active and passive activities are limited. 2. subacromial impingement, the typical performance is pain when the shoulder joint is lifted. 3. rotator cuff injury, the typical performance is the shoulder joint passive activities are normal, active activities are weak or painful. 4. biceps long head tendonitis, the typical performance is the humerus Inter-nodal groove pressure pain. Different diagnoses and treatments are different and even diametrically opposed, so a correct diagnosis is the basis for good results.