There are many reasons why you can’t lift your arm after a while, and the common ones are cervical disc herniation, frozen shoulder, and cervical spinal stenosis. 1. Cervical disc herniation: the intervertebral disc, especially the nucleus pulposus, protrudes or prolapses in the posterior spinal canal under the action of external factors after degenerative changes. This process causes the spinal cord and spinal nerve roots to be compressed or stimulated, because of this mechanical nerve compression and local inflammatory stimulation can lead to shoulder pain and arm lifting, but after a while it will be fine. 2. Frozen shoulder: self-limited aseptic inflammation of the soft tissues around the shoulder joint for unknown reasons, mainly manifested as shoulder pain and activity disorders, such as the arm can’t be lifted up or the limitation of external rotation and abduction, etc., and the symptoms are usually relieved sometimes and sometimes serious. 3. Cervical spinal stenosis: Symptoms occur when the cervical spinal canal is narrowed for various reasons, resulting in nerve or spinal cord compression. Cervical spinal stenosis can reduce the effective space and blood supply of the spinal cord and nerves, causing dysfunction and symptoms such as shoulder pain, inability to lift the arm after a while, accompanied by numbness in the limbs. Shoulder pain and inability to lift the arm after a while, can also be seen in other diseases such as shoulder impingement syndrome. It is recommended to go to the hospital in time to complete the examination, clear the cause of the disease, under the guidance of the doctor to actively standardize the treatment.