Hand tremor in a 30-year-old may be hepatomegaly. It is a hereditary disease caused by a disorder of copper metabolism, and is most common in people aged 20-40 years old. It is mainly characterized by a resting tremor, which worsens with nervousness, decreases with casual movement, and may disappear during sleep. Patients may also have increased muscle tone, and patients may present with masked faces. The condition usually progresses gradually, and there is no specific treatment, and it can be treated with oral amantadine. It may also be caused by long-term heavy drinking, long-term heavy drinking may cause cerebellar atrophy, the patient may appear dizziness, balance disorders, ataxia, there may also be intentional tremor, manifested as a tremor when the hand holds something, usually when the tremor reduces or disappears at rest, the patient should be instructed to abstain from alcohol.