Chronic right shoulder pain is associated with frozen shoulder and rotator cuff injury. Long-term pain in the right shoulder is commonly seen in the following situations: 1. Frozen shoulder: mainly manifested as shoulder joint pain and activity limitation, pain often aggravates the original chronic discomfort in shoulder joint movement, which can appear at night and lead to gradual limitation of shoulder joint activity. The pain can reflect upward to the neck and radiate downward to the elbow. 2. Rotator cuff injury: patients often feel pain in the shoulder, which can be radiated to the area related to the deltoid stop, and the pain can be aggravated during active activities. Active shoulder abduction, external rotation or internal rotation is also limited. Long-term pain in the right shoulder may also have other causes, it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or therapy.