Head shaking is most common in primary tremor, also known as idiopathic tremor, and sometimes clinically called senile tremor, which is common in the elderly. It is a hereditary disease that begins with head tremor and may develop over time with shaking of the hands, usually symmetrical and bilateral, and progresses gradually, but very slowly. Most of these patients do not affect their lives, so there is no need for special treatment. In addition to the common idiopathic tremor, there are also patients with advanced Parkinson’s disease, where the tremor of the head may appear in the late stages of Parkinson’s disease. There is also a small percentage of people who have over-physiological tremor, caused by anxiety. So the diagnosis of constant head movement depends on the patient’s age and medical history.