A 12-year-old male student felt dizzy and had weakness in his right lower extremity after performing 200 “look right” movements in a student military training activity, and was considered to be an adolescent spontaneous circumferential subluxation after radiography and other examinations. Two weeks later, the above symptoms improved significantly. Most scholars believe that the common causes of circumferential subluxation are trauma, deformity, neck infection, and improper posture. The only thing that restricts the rotational movement of the cervical spine is the pterygoid ligament, the posterior rectus muscle, the inferior cervical oblique muscle and the cervical semispinal muscle, which are the active muscles that make the upper cervical spine rotate. Adolescents are prone to spontaneous dislocation due to high intensity cervical spine rotation activities due to insufficient muscle strength and underdeveloped ligamentous joints. Insufficient knowledge of the disease can lead to misdiagnosis and underdiagnosis. Orthopantomogram of the cervical spine opening and measurement of the symmetry of the block spacing on both sides can effectively determine this disease. If upper cervical spine disorders are considered, cervical spine opening radiographs can be routinely given to reduce the rate of misdiagnosis and omission. The treatment of this disease is conservative, and traction, cervical brace fixation, massage and functional exercise can achieve better treatment results.