The cause of involuntary hand tremor in young people may be idiopathic tremor, hyperthyroidism, physiological tremor and so on. It is recommended to consult a doctor in time to identify the cause of the disease and treat the symptoms. 1. Idiopathic tremor: a common movement disorder with tremor as the main manifestation, can occur at any age, often manifested as distal upper extremity postural or motor tremor, accompanied by head, mouth, face, or voice tremor, the lower extremities are less often involved. If young people often involuntary hand tremor can be considered this disease, it is recommended to consult a doctor in time to clarify the diagnosis. 2. Hyperthyroidism: patients may have obvious hypermetabolic manifestations, with hyper appetite, emaciation, weight loss, easy sweating, short temper, irritability, etc., easily accompanied by distal paroxysmal tremor of the upper limbs. 3. Physiological tremor: mostly seen in emotional tension or excitement, patients with anxiety disorders, this tremor may be more obvious. Therefore, if young people have involuntary hand tremors, it is recommended that they seek medical attention to clarify the cause and deal with it in a timely manner.