Head shaking is most commonly associated with idiopathic tremor, also known as primary tremor, and is seen in the elderly and in patients with a family history of tremor. This tremor begins as an involuntary tremor of the head, sometimes accompanied by symmetrical involuntary tremor of the hands, and it develops very slowly and does not affect the patient’s life and work much, so the patient does not use medication. If a young person has involuntary head shaking, it is necessary to consider whether there is an emotional or hyperthyroid problem, so a full set of nail function or thyroid indicators should be checked to exclude hyperthyroidism. If the patient has anxiety problems, anti-anxiety treatment will be administered if necessary. Parkinson’s patients may also have involuntary head tremors in the late stages, but they still show movement disorders of the limbs and head tremors in the late stages, so it is better to differentiate them.