Head tremor, there are several possibilities: first, primary tremor, also known as idiopathic tremor, is the most common cause. Patients can have involuntary shaking of the head, as well as involuntary shaking of the distal extremities of both upper limbs, which is more pronounced during activity and difficult fine movements, often with a family history, and in some patients after drinking alcohol, the symptoms can be reduced. Secondly, Parkinson’s disease, whose tremor is resting tremor, often in the distal part of both upper limbs first, obvious at rest, reduced after activity, disappears after sleep, and aggravated when nervous. There are other symptoms of Parkinson’s disease, such as bradykinesia and increased muscle tone. Third, hyperthyroidism. It is usually seen in young patients, whose heartbeat tends to be faster, with large meals, wasting, obvious symptoms of hyperthyroidism, and higher than normal blood thyroid hormone levels.