There are several possibilities for involuntary head shaking: 1. Idiopathic tremor, a common involuntary movement disease of the nervous system, the cause is unknown, some patients have a family history, the early onset of the disease is a slight shaking sensation of the head, hand shaking, obvious when holding objects, disappears when stationary, the patient himself is not conscious, family members see the discovery. 2. Parkinson’s disease, mostly seen in elderly patients, patients have head shaking or hand shaking, and also other symptoms such as hypertonia, bradykinesia, walking with abnormal sweating, panic gait, etc. 3. The patient also has other symptoms such as increased muscle tone, motor retardation, leaning forward when walking, panic gait, and sometimes abnormal sweating, abnormal urination and defecation, and other autonomic reactions. 3, hyperthyroidism, mostly seen in young patients, physical examination of the thyroid gland abnormalities, serum thyroid hormone test can be found hyperthyroidism, patients with hand tremor is more common, occasionally accompanied by head shaking.