Cervical physiological curvature regression is generally more serious than cervical spine straightening. The physiological curvature of the cervical spine is necessary to maintain the normal movement of the cervical spine. When cervical spondylosis or cervical degeneration occurs, the physiological curvature of the cervical spine may be straightened, resulting in pain and discomfort in the neck and shoulder area, accompanied by numbness and weakness in the upper limbs. If the physiological curvature of the cervical spine is straightened and the condition is not properly treated, the condition will gradually aggravate, and then the cervical spine may be inverted. It may cause dizziness, nausea and vomiting similar to vertebral artery-type cervical spondylosis, as well as numbness and weakness of the limbs, decreased sensation, limited activity and walking, or even paraplegia, incontinence, and so on. Therefore, the physiological curvature of the cervical spine is generally more serious than the straightening of the cervical spine. It is recommended to go to the hospital in time when abnormalities in the physiological curvature of the cervical spine are detected, so as to avoid delaying the condition.