Shoulder pain in the morning can be caused by the following reasons: 1. Periarthritis of the shoulder joint, middle-aged and elderly patients can have an attack of periarthritis of the shoulder joint in the morning, and the patient will have painful symptoms of the shoulder joint, which is an early manifestation. As the disease progresses, the pain symptoms will continue to increase and will also cause limitation of shoulder joint movement. 2. Cervical spondylosis attacks. Early and middle stages of cervical spondylosis can also cause patients to have shoulder pain symptoms, which are more pronounced in the morning, and are related to the sleeping position and pillow height during sleep. The patient’s pain symptoms are usually not serious and can be significantly relieved after traction treatment, but if not treated in time, the symptoms will gradually worsen. The above two conditions are common causes of shoulder pain when waking up in the morning. Early diagnosis and early treatment can lead to satisfactory control of symptoms. In normal life, attention should also be paid to avoid cold and overexertion of the shoulder joint and avoid overexertion of the neck.