Lying down and not being able to lift your neck up and sideways can be caused by cervical spondylosis, muscle spasms and neck injuries. 1. Cervical spondylosis: patients with cervical spondylosis due to the compression of the nerve will appear neck and back stiffness, activity is obviously limited and other symptoms, will cause lying down the neck can not lift up the side can get up the phenomenon. 2. Muscle spasm: lying on the neck can not lift up the side can get up, may be due to the neck cramps caused by the neck, usually with a long time with poor posture of the neck has a relationship. 3. Neck injury: neck injury caused by sharp contraction or excessive stretching during exercise can lead to the phenomenon that the patient’s neck can not be lifted up when lying down and the side can get up. When patients can’t lift their necks up when lying down, it is recommended that they go to regular hospitals for examination and treatment in a timely manner.