Patients get up in the morning with arm pain, which is commonly caused by shoulder diseases, cervical spine diseases, etc. The details are as follows: First, shoulder diseases: such as periarthritis of the shoulder joint, which occurs in middle-aged patients, can lead to pain in the upper arm with limited shoulder joint activities. If the shoulder is injured, such as shoulder dislocation, during the recovery period, there will also be pain in the shoulder and arm when waking up in the morning, accompanied by limited activities. Second, cervical spine disease: When cervical spondylosis or cervical disc herniation occurs, the patient will have symptoms of radiating pain in the arm when waking up in the morning, accompanied by cervical pain and limited movement. Patients can be diagnosed through X-ray and MRI of the cervical spine and shoulder joints. With early treatment, the pain can be completely relieved. Care should be taken to protect the cervical spine and shoulder joints from strain, cold, and trauma.