Scapular pain and rattling may be caused by physiological reasons such as muscle spasm, or it may be caused by pathologic reasons such as frozen shoulder, trauma and local fasciitis. 1. Muscle spasm: it is mostly seen in poor sitting or sleeping posture, which leads to muscle tension and spasm in the back of shoulder, and the patient may have soreness in shoulder blade, and the spasmodic muscle rubbing against the bone may produce strange sound when moving the shoulder joint. 2. Frozen shoulder: due to long-term shoulder strain, cold and other factors cause aseptic inflammation of ligaments, fascia and other tissues around the shoulder joint, patients may have soreness of the shoulder blade and symptoms such as popping sound when moving. 3. Trauma: If the acromioclavicular joint is dislocated or the scapula is avulsive fracture caused by trauma, the patient may have symptoms such as soreness of scapula, rattling and limitation of activities. 4. Local fasciitis: due to long-term strain, friction and other factors lead to inflammation of the local fascia of the scapula, patients may have scapular pain and rattling. Scapular pain and rattling may also have other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.