The common clinical causes of hand tremor in young people include idiopathic tremor, alcohol withdrawal syndrome, hyperthyroidism, and young-onset Parkinson’s disease. 1. idiopathic tremor: this disease is an autosomal dominant genetic disease, which can occur at any age, but mostly starts in adults, the cause of which is the dual role of genetic and environmental factors, with clinical manifestations of involuntary tremor of the head, limbs, trunk and facial muscles. 2. Alcohol withdrawal syndrome: this condition is common in alcoholics with physical dependence. During the process of alcohol withdrawal, the central nervous system loses the inhibitory effect of alcohol, which leads to excessive excitation of the cerebral cortex and the β-adrenergic nerves, and the clinical manifestations include generalized muscular tremor, nausea, vomiting, and loss of appetite. 3. Hyperthyroidism: this disease refers to a clinical syndrome caused by excessive production of thyroid hormone, excessive thyroid hormone levels in the blood will cause hypermetabolism and increased systemic excitability, with clinical manifestations such as agitation, tachycardia, agitation, weight loss, and hyperphagia. 4. Young-type Parkinson’s disease: the onset of this disease is concentrated in the age of 21 to 40 years old, most of the people with a family history of the disease, and its clinical manifestations include tremor, postural balance disorders, mood disorders and so on. When young people have hand tremor, it is recommended to go to the hospital in time, under the guidance of the physician to improve the relevant examination, in order to clarify the diagnosis and give symptomatic treatment.