Slight involuntary hand shaking may be caused by physiological factors, such as emotional excitement, nervousness, etc. It may be caused by pathologic factors, such as hyperthyroidism, Parkinson’s disease, etc. It can be treated by self-regulation, drugs, surgery, and so on. 1. Physiological factors It may be caused by excessive mental tension, emotional excitement, anger, etc., and the hands may shake with small and irregular amplitude. Usually, it can be recovered after mental and emotional stabilization, and no special treatment is needed. 2. Pathological factors (1) Hyperthyroidism: caused by excessive secretion of thyroid hormone in the body, it will lead to increased sympathetic excitability in the body, which will be manifested as hyperactivity, excessive sweating, and involuntary slight trembling of the hands, etc. The symptoms can be treated with medication under the guidance of a doctor. It can be treated with medicines under doctor’s guidance, such as propylthiouracil tablets and methimazole tablets. (2) Parkinson’s disease: belonging to the neurodegenerative diseases, patients may have slight involuntary hand tremors. It can be treated with medicines under doctor’s guidance, such as phenazopyridine hydrochloride tablets, levodopa tablets and so on. Involuntary hand trembling may also be caused by other reasons. If the occasional slight trembling, you can temporarily observe, if the shaking appears more often and lasts for a long time, it is recommended to go to the hospital for examination and treatment.