If a patient has shoulder pain when lifting the arm, the specific causes are as follows: 1. First, we must rule out that it is caused by trauma, such as periapical fractures or contusions or contusions of the surrounding soft tissues, which can lead to painful symptoms in the shoulder when lifting the arm. 2. Obvious cervical spondylosis, especially in the case of cervical disc herniation and bulging discs when lifting the arm will also cause shoulder pain. 3. Frozen shoulder, the most obvious clinical symptom of frozen shoulder is lifting-like pain. The most obvious clinical symptom of frozen shoulder is lifting-like pain. 4, internal diseases to be considered heart disease, if the patient has pain in the shoulder when the left arm is lifted, coronary artery atherosclerotic heart disease, unstable angina will appear such symptoms. 5, if the patient appears obvious pneumothorax, large pleural effusion, or the left side appears obvious such as a large area of lung infection, the shoulder will also appear stretching-like pain when lifting the arm. Pain.