Shoulder pain after waking up is mainly caused by the following points: 1, pillow: pillow: pillow also called loss of pillow, mainly due to incorrect sleep posture at night, or pillow too high, too low, as well as the neck slipped, pillow overbending, inducing patients to fall into the pillow. This can lead to neck pain and shoulder pain, and can also lead to restricted neck movement and other uncomfortable symptoms. 2. Cervical spondylosis: Cervical spondylosis compresses the nerves and causes numbness in the fingers, or weakness in the fingers, soreness in the arms, or pain in the shoulders. 3. Frozen shoulder: Frozen shoulder is also called periarthritis of the shoulder, and the main symptom of this disease is shoulder pain. The main symptom of this disease is that the patient has shoulder pain.