After many years of advances in imaging, the diagnosis of vertebral instability has become clearer and clearer, and it is considered to be vertebral instability when the displacement between adjacent segments is in the normal position, or when it is in hyperflexion and extension of more than 3.5 mm and when the angle between adjacent vertebral segments is greater than 11°. Vertebral instability is not only an imaging manifestation, but more importantly, it needs to be symptomatic and uncomfortable for the body, mainly in the form of vertebral instability, which affects the surrounding nerve tissue and vascular tissue, causing compression or vascular distortion causing symptoms. If no symptoms are caused, cervical instability will not be diagnosed clinically, and only imaging plus clinical symptoms will diagnose cervical instability.