Shoulder popping refers to the abnormal sound of shoulder vibration during shoulder joint activities, which may be caused by abnormal development of shoulder joint, frozen shoulder, bursitis and other factors. 1. Developmental abnormality: Shoulder joint developmental abnormality, such as pteronotalar shoulder, may cause shoulder popping phenomenon, which can be reduced through appropriate muscle strength exercises to strengthen the muscle function. 2. Frozen shoulder: due to the degenerative disease or trauma of shoulder joint, it can lead to the aseptic inflammation of the tissues around the shoulder joint, because of the adhesion and damage of the soft tissues, which can cause popping sound when the shoulder joint is moving. 3. Bursitis: Because of shoulder joint trauma or repeated wear and tear or aging, bursitis of the shoulder joint will occur, which is also prone to popping sound during shoulder joint activities. If shoulder popping occurs, it is recommended to consult a doctor in time, follow the doctor’s instruction to do further examination, find out the cause with the doctor’s help, and carry out targeted treatment or treatment.