The 8-year-old boy’s head bobbing may be caused by physiologic and pathologic factors (vitamin D deficiency as well as Tourette’s syndrome), among others. 1. Physiologic factors: Habits, imitation, stress, etc. can lead to transient bobbing of the boy’s head. 2. Pathological factors (1) Vitamin D deficiency: due to the lack of vitamin D, resulting in a lack of calcium in the body, the child is malnourished, the lack of calcium after the increase in neural excitability, will lead to 8-year-old boys head swaying phenomenon. (2) Tourette’s syndrome: the medical belief is that abnormal contraction and spasm of the neck muscles can lead to the occurrence of tics. The most common manifestation of the onset of this disease is the involuntary movement of the head, which can be manifested as shaking the head, which can lead to the phenomenon of 8-year-old boy’s head swaying. The 8-year-old boy’s head shaking, there may be other reasons, it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.