Shoulder subluxation is characterized by shoulder pain, swelling, and impaired mobility, as well as square shoulder deformity and depression between the acromion and humerus. Shoulder subluxation refers to the semi-dislocation of the glenohumeral joint of the shoulder, with the head of the humerus sliding outward and a gap between the head of the humerus and the acromion, which affects the movement of the upper limb, and is commonly seen in people who have had a stroke. Shoulder subluxation is often accompanied by rotator cuff tears and supraspinatus tendon injuries, and can be associated with symptoms of shoulder pain, which is more pronounced after compression and activity. Weakening of the posterior rotator cuff after shoulder dislocation can lead to shoulder weakness, and disruption of the normal alignment of the humeral head with the glenoid of the scapula can limit shoulder motion. Shoulder subluxation can also lead to deformities of the shoulder, such as square shoulder deformity, palpable depression between the acromion and the humerus, winged scapula, and atrophy of the deltoid muscle. The diagnosis of shoulder subluxation is mainly based on medical history, clinical manifestations and X-rays, etc. It is recommended that suspected shoulder subluxation should be promptly consulted, relevant examinations should be perfected, and treatment should be carried out according to the doctor’s instructions after the diagnosis is clarified, which may affect the function of the upper limb if it is not treated in time.