How should square shoulder deformity be examined?

　　In shoulder dislocation, the shoulder triangle relationship is changed, and a distinct depression and hollow feeling can be palpated below the acromion, forming a typical square shoulder deformity. In the case of acromioclavicular joint dislocation, the protruding bone end is palpated at the outer end of the clavicle, and when pressed downward, there is a piano-key-like bouncing sensation and obvious pressure pain. Therefore, when examining the square shoulder deformity, the following features can be used: 1. Bony signs: Shoulder palpation should focus on palpating the bony signs of the shoulder. The three points of the shoulder peak, greater tuberosity and rostral process form a triangle, called the shoulder triangle. The peak of the shoulder is at the highest point of the bony prominence of the lateral shoulder; the bony hypertelorism below it is the greater tuberosity of the humerus; the lateral end of the clavicle is in front of the peak of the shoulder; a horizontal finger below the junction of the outer and middle 1/3 of the clavicle and above the humeral head is the rostral process.　　2. Pressure points: The above bony landmarks are often common pressure points for clinical diseases. For example, in periarthritis of the shoulder joint, the pressure points are mostly in the groove between the major and minor tuberosities of the humerus, the rostral process and the supraspinatus fossa, and later form extensive adhesions and dysfunction; in biceps long head tendinitis, the pressure points are mostly limited to the groove between the tuberosities, and the thickened long head tendon can be palpated; in biceps short head tendinitis, the pressure points are mostly limited to the rostral process; in deltoid subacromial bursitis, the pressure pain is widespread, but mainly located in the deltoid area; in supraspinatus tendinitis In supraspinatus tendinitis or supraspinatus tendon rupture, the pressure pain is located at the top of the tip of the greater tuberosity of the humerus. In myofasciitis of the dorsal shoulder, multiple pressure points and nodules may be palpated around the scapula in the back.